I hope I didn't offend as I wasn't trying to imply you might get a divorce. I just think a little independence is a good thing to keep even after marriage. So often we become so consumed with our identity as a couple, we forget to take care of ourselves too, and that is important to keeping things vibrant and interesting.
I also think Spacial is right about how to approach marriage. My biggest mistake was that I wasn't honest with myself and my wife before I got married. We were able to overcome just about everything life threw at us. Some serious and some not so serious. Everything except for this one thing. You shouldn't have that problem. However, other problems will pop up. Marriage is real work and takes a commitment by two people to overcome problems. As long as you have that, you should be fine and happy for a very long time. I'm sure you know all that and don't need to hear it from me.
As for Michael bringing up your past, just keep gently reminding him that you would prefer he not bring that up and let him know why. I think part of it for him is that you are so pretty now and look so different from the before pictures I've seen of you, he is still trying to wrap his head around it. I assume your personality has gone through a similar change. He probably still wonders how much of his old friend is still in there, much like he did when you first started dating and he wanted to play basketball etc. It really hasn't been very long since he got to meet the new you. I imagine his curiosity should fade with time as you grow in your lives together.
I wish you only the best. Like everyone else here, I anxiously await the wedding photos, especially the ones of you in your wedding dress. I long for the chance to be married once again myself some day, but this time as the bride escorted down the aisle in a beautiful white gown. It is a dream that you are living and I am very happy for you.