I think there is a danger in becoming too attached to someone and turning them into your "safe" person. I'm not sure where you are in your treatment, but I have PTSD and have been through a number of treatment programs and am currently in the 3rd (final) stage of healing. Anyway, when I was in the trauma hospital they warned us against having "safe" people or objects because once these people/objects are unavailable, we feel UN-safe. I think it would be helpful for you to foster a sense of safety outside of him. Don't get me wrong, I am not saying to not have people in your life who make you feel safe, rather don't rely on them to give you a sense of safety. I wish you the best.