My ex has bipolar. what do i do?

Partners represent many messy, painful things. Trust. Love. Commitment. Responsibility. Things that sometimes, we want to forget. Things that scare us. Trust is a big one for me. I have a very hard time trusting anyone, partly from being abused, and going on to lose my mother, partly from my latent paranoia. There is a gated complex around my heart and brain, and very few people have access to it. I do not trust people enough to allow them the privilege of potentially hurting me. (It took awhile to get over this with my children)