I truly believe that a man can be with one woman. It would be a struggle because men are visual. Let's face it, y'all love pussy, ass and titties.
Whether you could love someone and not be faithful is gonna be different answers. I understand mistakes. If you love someone then you don't wanna hurt them, you fight or do whatever you have to do to not hurt them. Cheating hurts. So, for me the answer is no. Everyone loves differently. If I love you, I don't wanna hurt you. I wanna build you up, make you feel special.