First you have to change your Black Father Noun a man who has stepped up to the challenge of raising shirt mind, just because your dad cheated on your mom doesn’t mean your boyfriend will cheat on you. Trust is the basis of a relationship. So if you really love him then trust him. If you are looking for something fishy then ask him. Don’t let trust issues ruin your relationship. Second, I want to say don’t tell your boyfriend about your father’s past. It is a past and it is not related to your boyfriend at all.