<human>: Could you distill the essence of the text into 1-3 sentences?

LDR relationship right out of highschool. We get along great when things are going good, but she has a lot of emotional self-esteem problems (as do I, honestly). She constantly blames herself for everything and things that she's not good enough and doesn't bring anything to the relationship. She likes to focus on criticisms and not compliments, regardless of the distribution between the two. 

I just found out that a week ago when she was visiting family, she ended up kissing a guy. I also found out that last fall her friend set her up on a date with another guy. Her friends constantly try to get her to see other people and always talk bad about me, but she agreed to the date. When we saw each other this past week, I saw her texting a friend that she missed the guy she kissed and had feelings for him. The friends encourage her to date and are extremely happy about her kissing and having a crush on another guy. 

We argue a lot because we're both stressed a lot and probably don't communicate as well as we could, and we've been on rocky relationship grounds since her dog died in january since she's been depressed. She's had a crazy number of things happen to her since we've been together (father fell sick with cancer, pet dog died, new baby brother that she has to take care of because her parents can't due to sickness, grad school). Unfortunately, we end up talking about her problems a lot and we never get to talk about mine. I'm always there to support her, but I'm not sure if she appreciates it, or if she ever has. 

I feel like I've been attacked in character by her friends and mixed with her low self esteem made her think that I don't care for her, and in return she says that she thinks she's stopped loving me. She's confused about having a crush on another guy and from our blatant miscommunications. I have no idea what to do in order to save this relationship. I want to stay together, but her self esteem issues always convince her that she's not good enough and makes me (who has natural trust issues) even more worried, especially now.
<bot>: gf of 5 years has low self esteem, and that's gotten in the way of our relationship. After kissing another guy and listening to her friends against me, she now wants to break up