Lots of times, guys want to get back together. Some become aggressive about it. There are many ways to spend time, and pining after a past relation is not a good one.
What I would do is kind of like a diet. In my case, changing phone number, moving, blocking his email, buying a new car, getting away. There is no just a little chocolate or potato chips.
It is all in or all out. That is how I like it for me. How you prefer would depend on your age, your experience, your access to meeting new people, your social level, your monetary situation, and your mental status.
He sounds like someone with old baggage from my point of view, and I would not be interested in fixing any of that. Nor, do I like to try to live up to some idealized past view I perceive someone might have. If you are still living at home, and still having your private documents read by parents, then, you are not ready to get married.
Get a job or go back to school for some certification. Get your own place and meet new people. That includes new men.
As far as a therapist, I don't think you will like it. The help you need is to complete yourself, not that idealized, "You complete me." That, being from a movie, Jerry McGuire.
It isn't really like that.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.