TACH
Don Juan
Your gf doesn't really deserve the treatment you've just given her. I would let her know that you aren't ready for such a commitment, because honestly you aren't if you're cheating on her. Rightly so, she'll probably be pissed off but that's something you've got to deal with. For you to say it weighs on your conscience and still you're nailing this other chick makes me wonder how much it really bothers you, if at all. I bet you wouldn't enjoy being put into your gfs position, so why do that to her?