How long should I wait on a guy for marriage?

I am 27 yrs old. I have a beautiful 5 year old daughter. And have been a single mom for some time. My bf and I have been together for three years now. We met when my daughter was 2 yrs old. We dated for about 4 months before becoming official. Then 9 months into our relationship, he moves about 2 1/2 hours away for a work opportunity. After he moved our time together was limited to only two weekend's a month. I felt sceptical about trying to have a relationship with someone long distance. However, our relationship seem to blossom better than ever. Our every other weekend's turned into traveling every weekend to see each other. We have talked about getting a place together but I guess I'm alittle worried. I would much rather be married and completely committed to one another before moving in together. He seems to completely agree. I don't want to travel anymore, I just wanna be together. We already make such great family. He already claims my daughter has his own. He shows us off to everyone has a proud significant other should. I've heard him call me his fiancee to others that he works with. Is there room for doubt here? How long should I wait for marriage? And should I go ahead and make the move without being married? Any opinions would be helpful.