No idea what to do now. Help.?

We started dating 9 years ago when we were 18. It would be a mistake to call our relationships perfect. Far from that. Quarrelling, bickering, wild , apathy, endeavours to understand her which came to nothing. But still we're together. Still dating. You know with age you begin thinking of starting a family even if you have always denied having a family. Now I know that I should have a family. I just do not want to stay alone in the dark with nobody when I am old. Friends are friends. But wife and children - this is something totally different. But what I also know is that it is a really important step in my life and I do not want to make a blunder. I do not want to argue or quarrel almost all the daytime and then to put up with her at night as it usually goes, you know. But what I know is that she really loves me, though giving me too many limitations all the time: no drinking, no smoking, no swearing.... But if not her, who will love and stand me the way she's been doing? Thank You