Not sure if you're already married or about to be, but either way - mazal tov!
What you need to remember is that one fall doesn't mean you're back to where you started. It means you had a fall. No one is perfect, although everyone's slips and falls are different. Dust yourself off, remind yourself of where you're truly at, and move forward to a beautiful life.
As far as focusing on your wife, there are lots of ways to do that. As Eye pointed out several times, part of that is thinking about, actually considering, what she wants, and how to make her happy. The more you practice doing that, the more it'll become a part of who you are.
have a great shabbos!