<human>: I met this girl at the beginning of February and we moved pretty quickly. We've hung out every second day the past two weeks and I spend a lot of nights at her place. 

We introduced each other to our friend groups last week and all her friends called me her boyfriend and we all got along well. We had never had 'the talk' but from my point of view it was implied, we had all the qualities of being exclusive/dating.

I even stayed at her house last night and we had a long talk about past relationships, sexual partners, etc. Everything was great, she would ask me about my day, remember my midterms, etc.

Today I was talking to a friend of mine who told me our other friend said he slept with her 1 week ago. I was stunned. I didn't expect myself to react that way, after all we weren't technically dating, but I couldn't help but feel hurt.

I immediately texted her, "Why do your friends call me your boyfriend?"

She responded, "idk, I don't call you that"

Me, "Good, don't. Ever."

I then ended up calling her, she was at a movie with her sister and left the theatre to talk.

I got her to admit that she did in fact sleep with my friend last week but she said she was sorry, and that we weren't technically dating. She said if I had asked her to be my girlfriend she would have honoured it. She said she really liked me and wanted to keep what we have.

I'm on the fence now, in her defence I always told myself that, "Ya, we aren't dating, I would hookup with someone if the chance arose."

On the other hand it is hard to go back, I feel like the trust is gone and my friends will think poorly of me for giving in to her.

Thanks for reading and I appreciate all input!

Could you distill the essence of the text into 1-3 sentences?
<bot>: Seeing girl for 1 month, never talked about relationship shit but went on dates, met each others friends, her friends called me her BF. Found out she slept with my friend 1 week ago.