Gwyn, you feel guilty about the R with your ex-fiance simply because you have not yet learned to shore up your own boundaries and new coping mechanisms in relationships. You are repeating your past. It's really clear to me at least!
Quote:
He tried to make me happy, but in the end, I just couldn't get there with him and I really don't know why.
You cannot really and truly let someone into your life, and accept there love unconditionally, until you have learned to totally and unconditionally love yourself. IOW, no one can make you happy, you decide that you are happy and you act accordingly. A relationship can't be the only "happy" thing in your life. You are depressed. You are beating yourself up, focusing on the past, and engaging yourself in non-productive thinking. You have to find ways to focus on the good in you and remaining grounded and in the current moment.
Have you gone to see an IC? What support have you got beyond this board?