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

we were together for 3 years and i (22) was super hurt from her (23) breaking up with me.

i talked to another girl online and she could never let it go. she'd always bring it up and we stayed together for a year after that happened. she would constantly remind herself of it and cry. it was sexual the things i said online and i even went to her house and she saw a picture of her holding my ears. nothing happening though.

so my ex is bummed out but loves me and wants to keep it going. she tries and tries but seriously she always thinks about it. 

so come july this year we break up and she swears she'll never speak to me again. she even tries to hook up with a new guy but claims it sucked and all she thought about was me and it hurt to try.

i've been trying to contact her for months and no luck, and when she decided to contact me 3 weeks ago i picked up the phone so quick. she said she wants to meet up and talk and said "i dont want these three years to be a waste of time" and wanted to retry. she said if you dont bring up what i did when we were broken up i won't bring up what you did. ok. i agreed. 

so we're hangin out for about 2 weeks and i send her a message like "i cant wait to see your pretty face" and shes like "you think its all just happyness now and its all good? i still think about it, i can't do this."

FUCK. so thats the second time she leaves me and it hurts so much.

she tells me not to come over but i do sometimes and we talk and she said "i cant do it right now" but i find out she has a new roommate living there whos (19) and her little brothers friend that she likes.

she swears she wont do anything with him, but living together with someone you have a crush on..come on.

i'm just wondering why she came back round 2 and blew me off?
<bot>: gf of 3 years told me we'd never speak to each other again. she contacts me a few months later to retry our relationship and said she can't and now has a new crush, wtf?