<human>: So it's been exactly a month and a half since my girlfriend of a year and seven months decided to part ways with me. It all happened after she came to pick me up from one of my labs at school and I asked her not to come until later due to the lab being extended, yet she came anyways, got upset after waiting in the car for an hour, and we ended up breaking up. The same night she claimed I was her best friend, and I asked for complete honesty when I asked "is there someone else". She responded with no, and I did believe her, until my phone broke and I needed to use my old phone. Lo and behold, when using my old phone her facebook was still signed in, and the notifications were going crazy. She had been messaging another guy actively for a week and a half before the relationship ended, and she claims they will never date nor be in any kind of physical relationship whatsoever, and are only friends. 

Since the breakup, for the first two weeks at least, I had been acting very irrationally and was constantly pestering her, etc.
Since then, I've been completely isolating myself, but unfortunately I still really miss her and want to be with her. We have had very little communication within the last three weeks other than her asking for one of her hoodies back a few nights ago. She said she feels shitty about what she did and how she handled the situation. Is there anything I can do to fix what has happened? I really do miss her and I don't think I can handle being "just friends" if she pursues other relationships, which is unfortunate because we have common friend groups. Everyone keeps telling me things will get better and I will forget she even exists, but I know more than anyone with my ongoing depression that isn't going to happen for a very long time. I can be happy without her, having her makes me so much happier though.

Can you give me the gist of the text in a nutshell?
<bot>: Girlfriend of a year and seven months broke up with me, wanted to be friends, declined, I miss her and don't know what to do.