[Coffee.]

Let me first say I am very sorry for what has happened to you. Rape is hard enough to deal with, and I wish you luck for you and your unborn child.
This is obviously your own decision, since it is your life, your body, and your child. However, in my own opinion, I would forgive him because forgiveness helps yourself, and helps bring peace to your own soul, however, I would not date him nor would I trust him with my body or my child's body until he gets help. You had said he has problems with both drugs, a mental disorder, and the fact that he had been molested: He needs to be seeing a counselor before I would trust him with my child. He obviously has a past of violence, and I would not trust him until he can help himself.
However, like I said, it is your decision, and there is no right or wrong decision. Whatever you choose to do, I wish you luck for you and your baby!