Mental illness or not, there's no excuse for abuse. Nothing you learn or do will make him a better person. He will not stop beating you, the beatings will just get worse. Now I'm not 1 to judge, honestly. I too took my beatings like a good girl for my own warped reasons, BUT, my child (by that man) is the reason I got out. I'm worried about YOUR frame of mind, not his. Why is leaving such a terrible option when it equates the safety of both you and your baby? Surely you don't believe in staying with the father for 'the sake of the baby'? That idea is redundant when you put into context how many women fall pregnant via force... Please get help, run, you AND your child are worth it.