It's pretty obvious that they'll end up in a unhealthy relationship. Pairing up someone with daughter issues with someone with daddy issues doesn't usually end well.
Most likely, the girl will nudge him into the relationship, they screw in the heat of the moment, and everything spirals out of control from there.
Also, I find it funny that the comments are 50/50 hate or empathize. Personally, while I think he could be fathering better and be less weak-willed, I can give him credit for genuinely trying. It's just that sometimes, simply trying isn't good enough when you don't know what you're doing or if your personality mandates that you can't try hard enough. Yeah, part of the reason his life sucks is his own fault, but a lot of it is still due to circumstances way beyond his own control.