What should i choose for my next relationship?

I am just getting ove a terrible relationship that almost cost me my life. She (my x) crushed me. I gave so much and sacrificed a lot. She was not "happy" now she wants back in. I am not sure if i want her back ' She said she was going through problems. I understand that but she could do this again. I bought a nice home and want to settle down,i have a business that is stong and have a lot of assets. I want to marry. However I want this woman to be old fashion and followers morals and not feelings.I know that going back to my (x) could bring so much pain back if she repeated the same patern. But i love her. I do not know if i have enough to give my whole life to another woman unless it is her. but i cant trust her. but she has so much of my heart.