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: I've been with my girlfriend for 5 years now, I wouldn't say weve had the easiest relationship but we've made it this far so I think that's saying something. 

There is a woman I met at the gym(let's call her Jen) that I have been friends with since I started going there about 2ish years ago (it's a crossfit type facility so think lots of individual classes for working out). We have never  hung out outside of the gym, and never really been alone together besides short conversations by a squat rack or something. Jen left the gym because of the cost maybe a year and a half ago, and since then, the only way we have communicated is via Instagram messages, which my girlfriend can see if she wants to. We still talk regularly(once a day or so), honestly talk is a strong word, most of our communication involves funny gym memes, cool cabins, or cute furry animals. We generally talk positively about my girlfriend and Jen is well aware of my relationship. We have never crossed a line of flirting that I am aware of.

I have offered numerous times for my girlfriend to meet her or do a double date or something but she doesnt want to.

I assume this partially stems from the fact that 1. Jen and I have quite a few things in common and 2. She's somewhat cute. She's older than me and while yes she looks good for her age, there are reasons why if I was hypothetically single I would not be interested.

If given the opportunity, I would definitely hang out with her(as friends) to do some rock climbing or weightlifting since we share those interests but I would never do that if my gf wasn't comfortable.

Despite all of this, my girlfriend seems to loosely tolerate this friendship, but takes any opportunity to make fun of it or make it look suspicious. 

AITA for still being friends with this girl? Or is having "girl" friends just always going to be a weird and suspicious thing? Is this just my girlfriend projecting her own insecurities, or insecurities about our relationship? Do I need to put more work into our relationship to get rid of those insecurities? 

having a female friend on instagram