Definition: Given a real-life anecdote of a complex ethical situation, generate a suitable title that describes the main event/root cause of the situation. Imagine that the given text is a social media post, and you have to write the title of the post, so the users can decide to read the main text or not.
Input: (Obligatory apology for the long post, ended up being a cathartic release to type it all out)

Open relationship of 2 months, been relationship like and had sex most of the year. Met all his family etc, basically live with him. I help with house chores and our laundry, etc. He is 25. I'm 21. Incoming third person (Lana) is 23. I get along with my bfs family so well, his mum considers me as her own daughter and I go to extended family dinners and events. Lana and my bf work together.

We are in an open relationship because he has commitment issues after ending a 7 year relationship with the girl he thought was the one. Basically he wanted to buy a house, join bank accounts, have kids, and she wasn't ready. They also didn't make each other happy and were really codependent. Bf moved back home after the breakup at the end of last year. He said he isnt fucking anyone else and doesnt want to, and I believe him. It's okay with me if he does, just as long as it's not Lana (you'll see why below haha).

He was happy to be more affectionate, emotional, and boyfriend like, but to him a commitment is serious like you're either casual and not in a relationship or seriously thinking about a future together and working towards that. So this is what we ended up with.

He had an ACL and meniscus tear. Had surgery for it 2 days ago. Essentially, bed rest and crutches for at least the first two weeks. Intense rehab. No sport for 12 months, no gym for 2, etc. Very rough.

When he got out of surgery and woke up from the meds, he was like "hey, Lana is coming to visit in her study break. But I'm so keen to see you. You're so beautiful" etc etc.

Lana is his best friend, they used to be fwb. They are two peas in a pod and understand each other in an uncanny, mind connected way. Lana is in love with him and has issues with me, eg, she wasnt comfortable with me being there at the same time. She was the first one to see him after surgery, and the last one to see him before visiting hours closed. I visited in between with his mum and dad. 

I took him home the next day. Lana and my bf made plans to hang out then, so I disappeared but in an emotional huff. Basically I asked bf where I should put his stuff before leaving, he said bedroom, I put it in the bedroom, and he got annoyed because it wasnt upstairs. He dramatically expressed this. Tried to cut him slack because of painkillers and he just went through a major operation, but basically left in an emotional huff. Didnt stay to resolve it because if Lana saw my car there, she would irrationally lose her shit. It's happened before. He said he was disappointed and I responded with, I stay and I'm in the wrong, I go and I'm in the wrong.

He also said (when I pressed him) he prefers her company because I'm serious and argumentative.  (I am, except he was bringing up Lana for no reason and knew it would push my buttons, and I said so and asked him to stop, he didnt, and then he got mad that I was annoyed and sad. He also ended up fighting, separately, with his ex, Lana, and myself on the day of his surgery. I feel like that's more indicative of him just being an emotional mess and arguing.) He was talking about how we should break up because he cant cope with Lana and I not being ok with each other, and because if we will work it will be after a break from this because it's too much right now. I agree. I'm in love, he doesn't know that, and it's hard as fuck, but I agree.

He texted me yestersay saying he felt terrible about it all and that he would call when Lana left. He never called. He said he fell asleep. This morning I asked if Lana stayed over and he said yes. This cut me so deep because, again, he chose her over me. He swaps between saying how I feel (really fucking upset) is valid and this is all fucked up, and then saying it's not a competition with Lana. I agree it's not a competition, but I shouldnt always be second to her. It makes me feel shit as his gf, it makes my confidence take a big hit, I feel insecure and not good enough, and sad/depressed. This has only emerged over the last few days with his surgery stuff. I am not ok with feeling like this. Also feel preemptively embarrassed because she was there, not me, and his family might think I just dont give a shit when I've done everything I can for him including moving my flight dates so I can be here. (Surgery was planned for a different date but there was a last minute change.)

This is exacerbated, I think, because we broke up around 3 weeks ago because Lana was way too irrationally upset and was saying stuff like "I will quit, I cant handle seeing you" and "we cant be friends" etc and being verbally abusive to him. He isnt willing to quit, and isnt willing to give up his friendship. That's fine, I've never asked him to. It's not my place to do that. He ended up saying fuck it, no, this isnt right, she cant keep controlling this. I think this history just makes it harder for me emotionally.

This morning he said he doesnt want to talk, and that if I genuinely care, I would first want to make sure he's okay. He wants me to come over for company while Lana is there. He said Lana is ok with this. I would have been, but for her staying over last night instead of me. I cry or feel really sad when I hear her name or think about her. I'm not angry anymore, just really sad. Like I've spent a fair bit of my alone time crying. Cried on his surgery day when I wasnt the first to see him, after I left when Lana was coming to see him, yesterday arvo and then went out with friends to a bar, came back at 2am and cried myself to sleep. Cried when I woke up after hearing she slept at his. I'm exhausted and drained.

I've gone through a lot of family issues (parents on off divorcing my whole life, and mum abusing me emotionally and verbally). Been through therapy for a while, but my therapist just moved countries. If I was healthy, i probably would have left a while ago. But things were improving, and i used it as a healthy way to learn about emotions and relationships through discussing things with my therapist. I never thought I could fall in love in my entire life, and yet I have. Even through the worst of it all, I've grown and have learned how to deal with my emotions better (still obviously needs work haha). Just putting this here because I'm hoping it'll make the story make more sense and give context. 

Tldr; WIBTA if I breakup with a guy I'm in love with 3 days post his ACL and meniscus surgery if I feel really sad because he doesnt prioritise me? Not looking for advice, just very morally conflicted.

breaking up with boyfriend post major operation