Look up methods of brekaing curses, as a precaution, for example try this (substutute the prayer with whatever fits your personal belief system):
Maybe try some baths as well with herbs in, there’s this brilliant ritual as well:
Have you had any readings done on the situation?
tarot (dot) com is a site I use for affordable computer readings, I’ve had good results from them (I’m not an affiliate or anything).
After you’ve done some work to break the feeling it dates back to his actions, find spells to attract the kind of man who wants a commitment. They do exist!
If you set out a plan of action and follow it, that addresses the possibility of a curse as well as any patterns in your own mind about this, so it’s win/win to take it seriously.