Constant competition with his ex...

Quick backstory, my boyfriend was on and off with his ex for 18 years and have no kids. They decided that they were more best friends than lovers and continued to stay friends.

Now we are dating and things are so up and down. She is a major support for him and I understand that. I have met her and she seems really nice. I even added her to IG. But as I was scrolling through her pics...I noticed he liked just about EVERY single one of her pics since we started dating and even commented on them. I looked over my IG and realized he only liked 2 out of all my pictures since we have been together. I never thought I would feel so jealous over some likes on IG or feel like I want him to pay more attention to my posts then he has...am I over reacting...😔