but I keep remembering his girlfriend. I can’t bring myself to let anything else happen, I even wish i hadn’t given in a few nights ago. Now, every time I look at him i think of it and then of his girl friend and how shitty I am to have let him do anything. What do i do?

First of all, if he has a girlfriend, he shouldn’t be flirting with you, making advances, etc and I think you should point that out to him. Then maybe explain that you’re physically attracted to him but tell him nothing will happen again while he’s in a relationship and that you feel guilty enough as it is.

I’m not really sure what is best, maybe one of our followers might be able to help?