Will I ever regret not getting married?

I am 29 and have never been married. I have dated different women since I was 18. Haven't been in a relationship since December of 2009.I have said for years I didn't want to get married.Will I regret my decision later on in life? I am just a loner and I come and go as I please. It doesn't make me jealous anymore when I see my friends with these beautiful women. I used to fel left out like it wasn't meant to be for me. Now I just have learned to accept being a loner. Have a great day!