I'd say Jon certainly loves her. They built that up since they met. It's not a one sided thing.

He shoved her out of the way, not to make an escape but to stop her from shooting a Wildling. Once she does that, she has no people. Jon can always run back to Castle Black... she can't really come with him, and he wasn't able to chop the guy's head off.

If she kills a Wildling, and even if they win the fight, killing them all, then what?