SUBREDDIT: r/relationship_advice
TITLE: Need help with dealing with my [25/M] emotionally immature girlfriend [28/F]
POST: Using a throwaway account for this.

Reddit,

I have been dating my girlfriend for the past year and some change. We had known each other for a couple years before that. I have always known she was somewhat immature, but I am struggling with dealing with it constantly.

A few examples:

1. If I ever tell her I don't like what she's doing or ask her to leave me alone, she storms off and sulks.

2. She overreacts about EVERYTHING. She is pregnant right now (and I have been around plenty of pregnant women) and EVERY day is just constant complaining. I don't want to be rude so I listen but it's always "I'm so tired" or "I am in so much pain" or "I don't like my job" or "I want to quit." I understand pregnancy is a huge burden but I work 50 hours a week and on top of that spend at least 20 hours a week studying and I never complain about being exhausted.

3. We are living at her parents house to save money for our first home. While I can't thank them enough, her mom HAS to be involved with everything (overwhelmingly on her own accord but my SO still lets it happen). This is so frustrating as I feel like she should give us a little space.

Apologies if this is rambling. I love my girlfriend with all my heart and I look forward to having a family together, I just am at my wit's end with this behavior. I don't know if I should tell her she's acting immature (she absolutely HATES when I say she's acting like a baby so I stopped saying that) or just suck it up and never deal with it? If you think I am being an ass then please tell me that as well. I appreciate your advice.
TL;DR: 
I sometimes feel like I am dating an emotional child and not sure if I should talk to her about it or just accept it.