Cheating does not necessarily have a lot to do with love, so yeah. Lots of men cheat not because they don't love their wife, but because they feel insecure, or they need to find something in themselves they don't find in their legitimate relationship. It could even be the need for the thrill of the danger, and the fear of being caught. More often than not, the cheating takes place because of the cheater, and not becauof the innocent party.
On the other hand it's quite a blow to the self esteem, and I can't see myself rationalizing about how my husband still loves me even if he's at it with another woman, so I guess there's little comfort in that.