Ok so this girl I was dating dumped me over the summer for another dude. Then we saw each other after the summer and she was like I love you still and blah blah. We had sex and I thought it was all good, but then she ends up taking this other dude back to her parents behind my back... she calls me, we get back together and she says she loves me. Would it be selfish of me to dump this girl because of all she did to me, or should I just be stoked I got another chance to be back with her?