Is this okay?

My previous relationship lasted about 2 1/2 years and there was no trust the last year. I just recently got in a relationship with this man who has been there for me through my abusive relationship and has been trying to get me for about a year now. We have been together almost 2 months and he has dropped girls to be with me. My problem is, one girl that he dropped is still trying to get with him. I trust him 100% for now but it does bother me that he is LIKING HER PICTURES ON INSTAGRAM. Should I be worried? It’s not every picture, but it does bother me when I see his name pop up on her likes. And I know it’s “just Instagram” but I feel like that gives her hope to keep trying to get him and I don’t want to lose this one guys☹️