<human>: My gf recently broke up with me because she claims i've changed. She said I changed into and asshole and that I made her feel like shit. But the reason i've changed is because of things that happened between us. Both she and I had moments us to lose complete trust in each other. 

Don't get me wrong, we had amazing times. Times that I would give anything to have back. I fell completely in love with her. I still am. But now she doesn't want to try anymore. She would try for a bit and i'd have this false hope. She'd be laughing and smile like she did when we first met. But then she'll tell me that it isn't the same and say things that would just break me.

Now she's falling for another guy, I guy that she told me "Not to worry about, nothing would ever happen". She swears on her dead friend that she didn't cheat while we were together, that she only talked to him after. But she's telling him all the things she used to tell me. And this was only a few days after we stopped talking.

Now we're talking again and I begged for another chance but she can't trust ME. She thinks i'll hurt her again. When I bring the other guy up she says if she could trust me she would drop him completely. But she says she can't bring herself to give me trust like i've given her. And i've tried everything I can think of to get her back but nothing is working. She doesn't want any type of relationship with me but still misses the memories just like I do. I don't know what to do anymore.

Could you distill the essence of the text into 1-3 sentences?
<bot>: My ex can't trust me and is starting to fall for another guy, don't know if I should try again or just give up.