This is obvious and has probably already been stated but you know what’s cool?
Finn and L.xa, both made it blatantly obvious that they were into Clarke and that they loved her, to the point of losing themselves (Finn shooting the grounder camp and L.xa bowing to her and compromising her people’s political position for her.) They both proved love is weakness.
Bellamy, on the other hand, did many things to show how much he cares about her but he doesn’t like throw himself at her feet. Because they’re partners and they’re equals and he loves her for that. She helped shape him and make him better and he did the same for her. Proving love can be strength.
And she loves him more than anyone because of that.