This whole thing is very unhealthy.
Yeah, it is. I think this is the first time I think you have posted that, so simply and clearly.
Why can't I just let it go?
I think this is a very important question that I hope you keep exploring and working on resolving.
Did you know that the average woman who leaves a partner who is outright physically abusing them, returns SEVEN times? That's huge! And in those relationships, they go back even though it risks death. Sometimes they go back because they are actually trying to solve an earlier abusive relationship - it's a trauma reenactment. I think in the past (correct me if I am wrong) but you have been previously abandoned by someone important in your life. Reenactments happen for people without severe trauma and PTSD too. This relationship might echo an earlier one, and maybe you are trying to solve it on an unconscious level and feel pulled to be drawn back in.
Sometimes people return to an unhealthy relationship because it hurts to let go. Sometimes it is because they unconsciously are seeking the "distraction" that the relationship is from bigger problems that feel harder to solve. In your case, if you did let him go, then you would be alone and facing the bigger problem of the lack of more social connections elsewhere.
There is also the behavioral phenomenon that whenever a behavior is rewarded intermittently, people can become addicted quite easily. This is why slot machines can be so addictive. In this relationship, your efforts to connect on a real level are sometimes rewarded. This Facebook mess is a great example. He is intermittently responding to what you bring up.
Behaviorally, it makes sense why you get pulled in and very may well be "addicted" to trying to solve/understand this relationship with this guy. I think it is especially hard because he suffers from PTSD and it is not that easy to walk away from someone who has a real struggle with a condition from trauma. I think it is poor insight for sufferers to think that it is easy to just walk away just like that.
I think others have a point about posting about the same problem in the sense that it's time to stop looking so much at trying to sort out why he is doing what he is doing, and focus more on why you are doing what you are doing. You do need to let this guy go for now, as the relationship isn't healthy for either of you. It really is like you are addicted to solving it.
The question about why you are addicted to the drama of this relationship is actually a very good question. There is a reason for every addicition. Usually, for the person who is addicted, the thing (which can include a relationship) that they are addicted to provides a temporary relief from pain. Sometimes people caretake or try to fix or solve others as a relief from pain. Like all addictions, it doesn't really work, but it might be playing a role as to why it is so hard to let go.
I disagree with the discouragement about positing about this. I personally get drawn back to the same unhealthy relationship patterns, but the more I talk and share about it, the more I get out of the loop and let it go more each time. I hope that maybe the same is happening for you. I also hope you keep working on this in counseling and keep reaching out for support to address the bigger stuff going on in your life.The more you address the pain you are in for all of your life, the easier it will be to let go of this unhealthy relationship. :hug: