I have insane jealousy issues that won't go away. Should I leave my fiance so he doesn't have to deal with it?

I tired of hurting him and at the same time I feel I am being hurt, due to my irrational thoughts. This was all caused by abuse as a child. I won't seek counseling as it hasn't worked ever in the past (made things worse!). So our relationship is where we love each other so very much and have a baby together, but I won't let him talk or look at any other woman at college, at the coffee shop, at anywhere. I know it is hard on him and not fair. In my mind I just want our relationship to be secluded and 150% intimate, with no outside influence. I know this is not normal and that my issues are my issues. So should I leave him have a happy life without me?