<human>: Been in a relationship for 1.5years with my gf, it wasn't perfect but honestly i feel as though my life was happier while we were together. Then out of the blue on friday she tells me she wants to try heroin, i kind of flip my shit because she's already addicted to adderall and used to smoke weed everyday. I tell her there's a chance of disease as well, etc... 

She constantly kept defending it, and how so-and-so from work does it and he's fine. Anyways I ask her if she's already done it, she tells me yes. I fucking get beyond pissed she lied to me and has shot up a needle inside of herself. Pretty much tell her to get out of my face while she's crying saying she's sorry.

The next day we meet up and I tell her if she wants this relationship to last she has to promise me she'll never do it again, she tells me she can't. I ask her why over and over until she finally says she wants to do it again because she enjoyed it so much. It's pretty much over.

Today I realize it is for sure over, since we managed to take back each other's stuff and it was killing me. So I went and bought a couple cases of beer, and went to the town festival thing or w/e idk it's the last day and somewhere to be. I find my friend and I talk to him a bit, keeping my mind of her. Then I found a cute girl.

We talk a bit, and I'm tipsy and feeling cocky so I flirt a little and straight up ask her if she wants to fuck. She says sure, and we made out and I was feeling awesome. We got to my place and fucked, and now I feel even more like shit and like a piece of shit.

Summarize the given text in a few sentences.
<bot>: gf did heroin, said she's wanting to do it again so we broke up. next day i found a girl and fucked her and feel like shit