What if I never get married?

I've had a strong desire for marriage ever since I was a teen.    It's really been heavy on me for the past 10 years to get married.   I turn 40, and the dating pool is getting quite shallow, and in desperate need of some chlorine.

What bothers me is the fact that I have absolutely NO control of it.    Getting married relies completely on fate.   It's not a goal I can earn.

I want a better job?   Go to school and get the relevant education.   Want a house or better car?  Save up $.   There's no game plan to make marriage happen.

 No one seems interested in me except for a few that are absolute terrible matches for me.   What if that's the best, or only offer of marriage I'll ever get?