My ex said he wanted to start over as friends so that we could do the relationship right. I told him I needed space to heal and disconnect from him and that I don't trust him with my emotions. I don't know whether to allow him back into my life or whether I'd be better to move on. I know guys will move mountains to be with a girl he really wants to be with, but he gives up easily and assumes he can't get or doesn't deserve something. And I don't want to be put on the back burner or be just a convenient option. What should I do? What should I consider?