I agree, marriage counseling for both of you is the best option. I'm sorry you've been hurt by this and I know what it feels like. You can't just stuff away your feelings, they need to be processed and validated. You both also need to find out why she cheated - is it from only her or was there marriage problems. As others have said, it takes a while for the pillar of trust to be built up again. Your feelings are normal and natural.