I'm young---I'm 26, and I have a wife and two young children (2 and 4). I'm at that age where I could have gotten involved in so much, personally and professionally---and still could. And I know that this will be a bit setback for things I'd like to do in the future. But time with my family is more important, and we also bought a house that needs a lot of work.
And I fully expect to be feeling exactly as you are describing. And I'm trying to come to terms with that today, while I'm still young: focus on what I can be happy for today, recognize how my decisions affect my future, how I might adjust my plans, and recognize that the decisions I made (or didn't) have desirable consequences that I wouldn't change if I had the option to go back and do it again.
Thanks for sharing your experiences.