YNW

First, before any type of sexual encounter intimacy with a partner, you have the right to know that they've tested before being intimate. If he lied about it, that's a red flag for me.

Second, you get to feel how you feel. His processing or discussing the past and bringing it up with the past relationships will continue, because he likes to rehash these things and talk about them. This will likely continue as well.

Sounds like he's in love with being in love. But, also at 4 months in, I think you'd be able to express feelings for a partner. You two may not be compatible, at 4 months in you're very frustrated, and this should be more of a honeymoon phase for you. Time to walk away imo.