YDI but also FYL, since it's a tricky situation and at least you've realised that you're doing something inappropriate. I would suggest you think carefully about which girl means more to you, then choose that one. As tempting as it can be to have multiple partners, if those partners believe in monogamy it's just never going to work out. I do have some sympathy for your predicament though. Personally I'm not monogamous and neither are any of my partners, and none of us have ever seen the point of monogamy. There are so many great people out there that it just seems pointless in our opinions to just restrict ourselves to just one partner. I mean, you can love more than one parent, more than one sibling, more than one child and more than one friend, but when you love more than one mate/sexual partner suddenly society thinks you're immoral and disloyal. It makes absolutely no sense in my opinion, but unfortunately if you want to be with someone who does believe in monogamy, you'll have to go along with their beliefs or else live a lie and constantly have to deceive them when you see other people.

simple solution; DONT F*CK*NG CHEAT!! Go for the second girl you "fell in love with."

Wow that's all i have to say about you you're a pig be faithful to one girl damn how hard is that

You're a douche for cheating, but I don't think you deserved that.

If you really cared about your girlfriend you never would have fallen for the second girl in the first place. Now be a man and end things with your gf, since you're obviously just using her as backup. She doesn't deserve to be treated like that.

You have to choose who you want more... I choose which one won't cut ur balls!

You sit are an asshat for cheating on your girlfriend in the first place, maybe your father went a little extreme in telling you to kill yourself however I can see why he would be mad

I wouldn't disown my son, but I'd in very certain words tell him how strongly I disapprove and I'm sure his two gf's would too!

Posting this on here is probably the worst idea you've had since cheating. You know that these comments are just going to be endless hate and make you feel worse, right? Go break up with one of them in person and be honest about the situation so she can punch you in the face. You deserve this, but you definitely shouldn't kill yourself. You can't be all bad because at least feel horrible about cheating; there are people out there who have no regrets at all about these things.

I like your father.