Being used to cheat on someone.

Aspen

Ive been screwing around with this guy and like I've liked him for a long time (like 3 years) and as I grew in those year's got prettier like more attractive I guess and like he's never paid much attention to me until him and his girlfriend started having problems then he admitted his feelings towards me. For the past couple of weeks we've been hanging out and making out. I want it to go further but I feel bad for his girlfriend, but also on the other hand she cheated on him. I'm sort of stuck in the middle and I sort of need help.

***UPDATE***

So today during class I went up to him and ended it because I don't want to be the second choice to anyone. Some boys just aint shit I guess 🤔