Many ways to make this easy or difficult for a conversation. As long as you are happy with yourself first to some point where there is some way to claim a way of verification that's enough as " healthy " then loving the other person more is just fine and go ahead and knock yourself out if they are that great. If the person doesn't like themself or that much and wants to substitute any of that part toward another person and just focus it all or add that part to the other person well.... You answer your question from here, it is self explanatory in an unspoken way.
