Blended Family Counseling

How to Feel More Secure in Your Second Marriage

My husband and I are on are both on our second marriage. I made a pretty clean break from my first husband but my current husband's ex is still in his life (they have a child together.) He often brings up their relationship and talks about how amazing it was before everything went sour. I don't believe he still has feelings for her, but it makes me extremely jealous when he talks about all the fun they used to have, vacations they would take, etc. She's also a very attractive woman and when she comes to get their daughter, I immediately feel insecure because she always looks great. Any relationship advice/suggestions on how I can feel more secure in this situation?