There are plenty of married students in school. Also, you will find out a lot of people in your class will get married during school - during the breaks usually.
For me, this is my second time in dental school - withdrawing in my second year the first time around. The first time I was single. This time I have been married over 7 years. Personally, I am grateful that I am married. When you are single, unless you are extremely dedicated, you are more prone to play more than you really should. I know I did. Plus, I didn't have a wife to come home to vent to when the totally sucked or a wife who would ride my butt if I wasn't studying enough. Thistime through, I have learned to be more efficient, even though I still have to study my butt off since my mind doesn't learn things as fast as they did a decade ago. I am more organized with my time, so I am able to spend at least a half hour with my wife each day. I know that doesn't seem like much, but it is better than not having her in my life. She gives me a reason to take my mind off school for at least a little while each day.
Yes, school is busy, but there is time to be married and get married. DON'T get married just because you are in school. If you want to get married and can afford to get married during school, then do it.