Why are you trying to make this about politics? People's point was that men have emotions just as much as women do, so saying that it's worse if you cheat on a woman or break a woman's heart is short-sighted and frankly stupid. Check out the original post to see the guy's reaction to her cheating 5 years ago.
I've had to deal with cheating in my previous relationship, though if it was just kissing I probably wouldn't have minded it as much. The worst part of it was all the lies I had to fight through, because even now I'm certain I only know half the story of all the times I got cheated on.
If your boyfriend says "I don't know" in regards to whether he likes her or if it's payback, then something weird is going on. You need to give him space for a while and tell him to think, then tell you his true feelings. Don't put too much pressure on him though, because I imagine that if the guy's actual response to the two questions is "no", then his actions have him very confused. He needs to work through this as much as you do.