I don't understand something you would deny being intimate with a guy that you care? Would that mean you value sex? So you might be feeling guilty because you're giving away something that you value
You can wait if you are willing to, but if you decide to move on, he isn't the only one
If it always feels wrong, would you still need time to sort yourself out before you're ready for a relationship? It may be your past relationship with your ex that's affecting your emotions