You're rockin', Lambchop! As a committed single chick, I must completely agree, it's best to do what I want, how I want, when I want, and not do it if I don't want to.
My (big) little brother is down here today, it's his 45th birthday and we two are the only of the six sibs who have not married. We were just cawfee tawking about how much we appreciate our freedom and contentment.
Don't compare yourself to others, concentrate on what you do have and remain thankful throughout your days. It's much easier and life has a way of rewarding you for it.