This is only my opinion and if it is not useful, please disregard. This is what I have found for myself and am sure it depends on the source of ptsd and symptoms.
I am not whole right now, so I attract people who either have bigger problems than myself, or more often, those who are looking for a victim-someone to bs, to control, to become dependent on, to blame, alcoholic, sociopath, etc. I know I have somewhat of a skewed perception, but if you spend much time with someone, questions come up. I believe that to be honest is the worst thing one can do until a lot of trust is built which takes a lot of time. We also seek our own reflection. I feel damaged still, and not whole, so I accept others flaws at face value. Only I dont really see them clearly, they are usually much more flawed than I am seeing. I think I have been vulnerable in some ways also. Maybe that is not the case with you.
Also, I have thought, just a date, not a relationship. But then have a couple of dates and the guy is texting and calling everyday. I have come to like to spend a lot of time alone reading and such. There are days that I do not want to be bothered and think this is healthy for me. Its part of my healing. But the other person takes it personally unless they know. If you tell them, I have found it to be used against me later. I have just found that it is just not worth it. I am attending a divorce group at the church and that is helping me to get in touch with what I am feeling. I think we all need to get out and socialize. I think if you join a group or take a class where you can meet friends that you have something in common with, you might also find someone that you want to date or same sex friends. I just think that if you decide to, that you proceed with caution. A bad relationship only complicates ptsd, further diminshes self esteem.
Whatever you do, protect yourself,