Originally Posted by learninginTN
I'm guessing he already has someone in mind, based on what you told us in your initial post. Since he does not yet have your blessing, that would be cheating.
I disagree. Being interested in someone else is not the same as acting on it. We humans are accountable for our behaviour, not our thoughts and desires.
Cheating is characterized by lying, pure and simple. Many people who have been cheated on report that it's not the fact that their partner was sleeping with someone else that bothered them, it's that their partner was lying and sneaking around.
If you tell your partner that you're going to have a relationship with someone else, then whether or not they give you their "blessing," it's not cheating. Disclosure allows them an informed decision whether or not to stay with you. Staying with you when you've told them you're having a relationship with someone else is a form of consent.
lemondrops has posted nothing that leads me to believe he's cheating. By the sounds of it, their 24/7 style relationship hasn't allowed him the opportunity. Of course, anything's possible, but I think you're jumping the gun.