Am I wrong?

My boyfriend of 8 years has over the last year gotten a little close with his ex who he had a child with to. She cheated and I met him when his son was 4 years old. Lately she calls for basically everything, she leaves hearts on his Facebook status and is all around just string shit up for me! She’s married and pregnant but to me it’s almost like she is trying to piss me off. Secondly my boyfriend REFUSES to put me back on any social media after a huge fight and put her AND her mother and sister! Now this family has also caused issues a few years ago in our relationship. He says I’m insecure! Am I or do I have a right to feel this way?