Answer
Putting aside the bisexual issue in your relationship, there are still some other red flags that we hope you consider.First, you are already engaged after knowing one another for only 3 months. We believe that it is important to have more time to truly get to know one another, including the baggage that you each bring from your upbringing. Three months simply isn't enough time for that.
Second, your comment about not having an argument seems to imply that you think arguing is bad for a relationship. Studies show that couples who don't handle conflict are the couples who end up being divorced. Healthy conflict in a marriage is a good thing.
Third, you haven't been honest with him about your feelings concerning his being bisexual. This isn't something you can or should hide. Talk about these feelings and questions with him now before you two get married.
As to his ability to be faithful, that is a personal quality whether a person is bisexual or not. We recommend that if you still intend to marry him, that the two of you attend pre-marital counseling.
Proceed to the next question.
