If your insecure about your relationship Is it wrong to ask questions?

My husband has made me very insecure about our relationship. We have been married 4 1/2 years, we dated several years before getting married. Although we had gone through alot before our marriage, we married and the relationship was great the first 3 years. About a year ago, my husband started staying out all night, has new friends that I have yet to meet, and apparently decided he don't have to answer to me when I have asked where he had been. Since then, I have been very distant, I don't feel that I can trust him. I question his every move, and he still feels that he don't have to answer to me. He feels I should not be questioning him about anything. He brought this insecurity to me so I feel that he should answer any question I ask him.Am I wrong?