Advice needed

Asalamulakum I hope brothers an sisters will be able to guide me in a sticky situation in which i do not know what to do. I recently found my husband to be engaged in homosexual activities where he had slept with men. Needless to say i could not marry him. The problem is that he says he wants to be a better Muslim and put all these activities behind him. Are there any help groups for Muslim men who are in this situation and are there any mosques or imams i can direct him to who deal with this sort of situation.