Being alone?

Do you think it’s possible to be alone your whole life and it not necessarily be a bad thing ?

I’m beginning to believe the best thing for me is to die a single man (unmarried that is; non-serious relationships are fine).

See the thing is I hate being tied down. The whole “a rolling stone gathers no moss” saying sounds awesome to me. I like being completely spontaneous and I’m very bad at sticking to anything for a long while. The same applies with people. They fascinate me for a short period then I feel like I’ve seen enough of them and move on. As you might imagine, I don’t do very well in relationships.
I go from being obsessed to randomly cooling off overnight and not caring about the person as much.

I see this as a character flaw on my part and I wonder if I’m really supposed to be with anyone. I’m not depressed about it or anything…I think people define themselves based on who they’re with way too early and never get a chance to figure themselves out.
Also, I don’t think I’ll ever be mature enough to be a father and a husband. I think bringing a child into this world would be one of the most irresponsible things I could do. Also, I wouldn’t want to have a failed marriage and hurt myself, my souse, and our children.

Do you think some people that are alone their whole life are fine with it and could never truly settle down? Do you think there’s any way to know if I’m one of those people?

Sorry for the long question but I didn’t really see a way to abbreviate this one.