I'm single, I'm happy and I'm only doing this so I can break 200 posts...
Seriously though, it really shouldn't matter how old you are in order to get married, all that matters is that you love the person and you know in your heart of hearts that she is indeed the one you want to spend the rest of your life with, forsaking all others...
Dude, I don't mean to be a downer, but don't you think the fact that you're even asking this question sort of answer it for you? Or did you just really need to hear other opinions?
If you love her, marry her.