Jealously in marriage

I have been married to my husband for almost two years now and it bothers me when one of his female cousins always post pictures of him or wishing him happy birthday. Is this wrong of me to feel this way? I don’t want to feel hurt but I don’t want him to be upset with me for saying something. I believe I feel this way because I was in a previous relationship where the person I was with cheated on me multiple times. I don’t believe my husband now would ever do that but it still bothers me.