He has said it isn't the relationship style for him.
But it doesn't mean he won't flirt, let you make regretful passes, have regretful sex or watch for you to leave your current relationship to be with him because you know, if you were really happy you wouldn't want him right?
I'd create a little space for a while to let things cool. Then consider him just a friend and treat him accordingly. See if he continues to seek you out anymore if you're just offering friendship.