SO insecurity advice

My husband while we were just dating always told be I made him feel insecure not because I was looking at other men or flirting with other men but because he sees how other men look at me he sees how even though I shoot them down they try to flirt with me or how some will complement me. I always ignore guys who try to hit on me because I love my man so much I have no need for someone else. And now that we are  married he still feels a little insecure not as much, but I always try to reassure him that I love him, he has nothing to worry about. He still gets mad when people try to flirt , any advice of how I could calm him down a bit? I love that he loves me so much and lucky too that he still gets jealous a little