either way it's hurts
If it is one person, it could be infatuation. If it was a number of people, I would think the cheater never intended to be faithful, and there would be more chance of me catching a disease.
i go numb since the first time happened it doesnt really bother me anymore just don't want to be in the relationship
The level of hurt is more in step with the level of love you have for the one cheating. How often they have cheated would be of secondary importance.
It would hurt less with more people because that is just sex, but one person might mean love.