One definition of insanity is doing the same thing over and over and expecting a different outcome. Maybe it will help to take a close look at all three relationships and try to figure out the common factors. It could simply be that you are attracted to people who are not capable of loving you as you need to be loved. If you can identify the immediate attraction trigger, you will then know who is to be avoided. Of course, that means that you you will probably have to forego that intense "instant gratification" honeymoon time and concentrate on developing long term friendships that may (or may not) lead to commitment.

SINS, who wishes she could follow her own advice.