Heya,
Well, is your husband a honest person? If so maybe you could just ask him. Honesty is super important in a relationship so if he tells the truth and its not to your liking well at least you know. Maybe you two could work something out like going to marriage counseling classes and what not. Trust me I know what its like to be cheated on by someone you love. But I’m sure he really does love you considering you both are still together. Best of luck now!