"I'm really sorry we got off on the wrong foot, but I really want to make the effort to get to know you and I feel it's important for you to feel comfortable around me. I really like your daughter, and I think it's important that you trust me with her. I am really trying very hard to be good to you, and I would appreciate it if you simply gave me a chance."
Things like that impress dads. Of course, if he's still a jerk, then you know that HE'S the one with the problem, not you. Sometimes, people are just asses, and there's nothing you can do about it. Just don't let him get to you - kill him with kindness.
