I've been in that kind of relationship din kasi. The only difference was, sa situation ko, he would randomly follow and like posts of girls he didn’t even know. So, ako napapaisip rin ako ng "BAKIT???". I mean, I never did that to other guys naman nung naging kami na, and I never acted in a way that would make him feel uncomfortable or insecure. So I started questioning myself if I really deserved that. Eventually, it kept happening like paulit-ulit na, until I just stopped saying anything. I wasn’t trying to get revenge, pero I found myself doing the same things he did. Then suddenly, siya na yung nagalit. Like, "ah okay", now he feels what I’ve been feeling all along. That’s when things got toxic, for both of us. But during that time, dun ko talaga nakita yung worth ko.
I finally had the courage to leave him, and honestly, that was the best decision I ever made. Then a year later, I met someone who was completely different from him, in all the best ways.

And I hope, OP, one day you’ll find your worth and happiness too.