<human>: Can you provide a brief rundown of the text in within 3 sentences?

I met my girlfriend half a year ago. The first months were perfect like every relationship start. We were almost 24/7 togheter and we felt we were meant to be togheter. But then problems arised. When she's in good mood everything is perfect. We laugh with each other, we have amazing sex, we do cute things togheter and we basically really love each other. But sometimes it gets really bad. She may start to treat me like shit (and this is my first relationship and Im a really nice guy I could never harm anyone. So at the start I would apoligize for everything and I felt guilty but now I understand that I should respect myself. Now I know that if she gets angry it doesnt mean that I did something wrong and there's no excuse for treating me that way). She even has this "I dont want a relationship" mood. When I met her she said she didnt want a relationship because her exs hurted her but after some time she said she would give it a shot because she loved me so much. But sometimes she starts to say things like "we should just be friends" or she starts to talk to me in a cold way, stop talking to me or just delete me from social media. 

This makes me feel like shit because I always treat her like a princess. I know its not her fault to have BDP and I love her so much but even if this is just 20% of the time we share it makes me feel really bad and I want it to stop. So I told her she should go to the psychologist and get some help because even if she doesnt mind being that way it makes me feel really bad sometimes and she said she wont because "thats the way she is" (plus she isnt very open minded & doesnt like psychologist). I feel like if she cared enough about me at least she should give it a try and try to get some help. 

What should I do.
<bot>: My girlfriend has BDP and even if everything is pefect most of the time she makes me feel like shit sometimes.