Let start off by saying I am married, I have two kids, and I (unfortunately) own two houses.
Three things I always say:
Never buy a house (rent and let it be someone else's problem)
Never have kids (if you can't take care of yourself or are not prepared to think LONG and hard about what it entails, don't do it)
Never get married (costs too much money to get married and costs to much to get out of it)
Only one I regret is buying my house and having the other to rent to my in laws. My kids are awesome I would not trade them for the world. But I have these thoughts as to how I am going to handle things when crap hits the fan, get into fights at school, get made fun of for some reason, etc etc etc. Those are the things you don't think of when you're planning on kids.
If you're happy with your situation, then stay that way. Nothing changes after your married besides her name and your bank account.