<human>: Can you provide a brief overview of the text?

Girl I started dating in 2010 for 10 months recently came back into my life. We ended abruptly over a stupid argument with no real closure. Literally one day fine and next day we stopped talking. Haven't spoke/seen each other in three years. We were never official but we both had strong feelings for each other.

She contacted me randomly after she spoke with our mutual friend(my best friend).  We met up one night and I thought we would go our separate ways again but we didn't. She began texting me more and more and eventually this led to dinner. We caught up on each others lives and she tells me she got into a relationship shortly after me and they have been together since. On the way home from that dinner she calls me and tells me she still has feelings for me and hasn't been able to stop thinking about me since we saw each other. She tells me she still loves me and it brought back some feelings I thought were long gone. We continue the constant contact.

It was her birthday on Wednesday so I tried contacting her but no response. She calls the morning after and apologizes. This past Friday and Saturday we face-time for couple hours each night and I know this is about to lead somewhere but I cant stop myself, I still have strong feelings for her after all these years. 

On Sunday morning she text's me to hangout before she hangs out with her friends. We hang and go our separate ways. Later that night she asks to hang out again. She comes over around 10 and we have sex. 

Afterwards she gets upset and says we can never speak again, how this wasn't suppose to happen, how her life is now ruined, how badly she messed up by coming over, etc...

She has now deactivated her FB, wont answer my calls/texts, and it appears she told her (ex?)BF what happened. I never wanted to be that guy who messes up a happy relationship but I just couldn't stop it. She was coming on too strong and all these old feelings came back. I wanted her back in my life but it seems we just never were meant to be.
<bot>: Let "ex" back into my life after 3 years, fucked her while she was in a LTR with another guy.