Mistrusting and jealous šŸ™ HELP

Iā€™m married to a good man, but I really doubt him most of the time. I donā€™t think he would cheat on me but I dont trust what goes on in his head. I donā€™t feel like heā€™s happy with me. I feel like he is discontent. Yesterday, over Valentineā€™s Day dinner, I see he is checking out girls butts as they walk by. Ugh. Heā€™s been talking to our neighbors, and the wife is so pretty- blonde blue eyes. He got her number and I just feel so, UGHH. Oh course he got her number as a friend, but I just donā€™t trust him at all. In the past Iā€™ve caught him doing things he should not be doing. And I forgive him for it but I canā€™t help but feel like he is not fully happy with me and I just donā€™t trust him. Even if he doesnā€™t cheat on me I hate the fact that in his head he doesnā€™t think Iā€™m good enough. Itā€™s driving me insane. What do I do?