My husband thinks I'm cheating on him

My husband and I have been married for just over a year now. I was married when I met him, but unhappy, so I got a divorce and moved in with my lover. 3 years later we married, and we were happy.
I've never cheated on him before, but his previous wife did. He's always accusing me of cheating on him with men. One of my close work colleagues is male, and just a few days ago my husband and I had a huge row, because he was so sure I was cheating on him. What can I tell him to stop him suspecting me?

its not a case of just dissmissin the doubts wiv a simple word-u have to prove to him you love him. maybe bring home your male friend 4 dinner, show your just friends. dont feel pressured to give up any of your male friends, because any husband who makes you do that is bein totally unfair.

also, it shows a lack of trust. just because his old wife cheated on him, doesnt mean you will. ask him that.