I can relate. I am 33 and married, no kids. The only difference for me before and after (getting married) is the amount of time you have available for your startup before you need to spend time with your wife or kids. Age is not a factor, the amount of time you have is the factor. But having someone supportive, wife or gf, is really a big plus. And it really helps a lot when you use them as a listener to pitch your idea to. They come up with amazing questions.
I'd like to read more about relationships and dating for entrepreneurs. i find it frustrating to explain what I do to women I meet, and even more frustrating when they don't "get" that, yes, just because it's 3am doesn't mean I'm not at work.
But the right woman who does get it is really quite special. My girlfriend has been really supportive of my projects and business effort, and it really means a lot.