Most Helpful Guy
Does it matter? Clearly he loves you if he's your boyfriend otherwise he wouldn't be with you...
But as for defending you, it could be that he cares about you or that he's defending his choice to be with you. But as for it being the key thing that shows he loves you... I don't know why you're having to ask that when he's your BOYFRIEND.
Most Helpful Girl
He sounds like he is sticking up for you. Does it mean he loves you when he does that? Sure. He just simply cares, because you mean a lot to him