Is it normal to hook up with my best friend's girlfriend?
My friend has been dating this girl for about 5 years, off and on. They first met when I introduced them because me and the girl knew each other first and originally had feelings for each other. Me and the girl had dated first but not for very long, possibly due to the fact that we were very young. Not long after we broke up, her and my friend started dating and I said it was fine. Since then I have had feelings for her, but we maintained our friendship and I consider her my best friend as well as him. We have been hanging out a lot lately and last night we admitted that we have had feelings for each other for a long time. We made out and cuddled and did some other sexual things too but we didn't have sex. We both feel bad about it but can't deny our feelings. I feel bad because her and my best friend are serious and are still dating. I don't know how to go about this, I almost want to continue with her but it will most likely ruin my friendship with him. We don't plan on telling him, but I will have the thought in my head whenever I see him.