Buddy its because of insecurity. We are all insecure in one way or another. What you need to do is just talk to your wife, tell her how you feel and maybe she can help you out by not doing some things. Then again, you need to also just remember to trust her and that she married you and that's a big commitment.
Being jealous and suspicious are not good traits to have. Self confidence is missing from your make up. You have to believe in your self and learn to trust others .Mainly your wife. Be proud of who you are and have that self confidence that will help you through life.
Well. . . .Yes and No. . . .you do need to learn to trust ur wife if you've been together for a long time and she's never cheated and you have kids together then you don't need to worry as much. . . so yes there is something wrong with you if you've got all that and ur always supicious, but don't think that just because you've got all that it means she'll never cheat cuz my parents had all that and my parents cheated on each other they got divorced when i was in H.S. so that's why I say Yes and No.