So, what happens now, at the end? *spoiler*
So, he fixed everything, and now the gf is alive and they are married, the parents are alive, he has a kid.....but what about his memory of the last 10 years? He is in the new "present", but he has no memories of the last 10 years! No wedding, no honeymoon, he doesn't know where he lives, did he go to college and get a degree? What about his job? What does he do now when a buddy comes up and he doesn't know who the guy is? I think that's going to be a pretty noticeable thing....who of us here can afford to lose the last 10 years of their lives, memory-wise, and get away with it? Even little things like having sex with your wife....she will know somethings up. (no pun intended).
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"I'm verklempt, talk amongst yourselves..."