I don't really feel like love can be quantified. It's one of those things that is an all or nothing thing. I love someone or I don't. The quality of that love can change: do I love you platonically or sexually/romantically, or both, or neither? Do I love you playfully and with joy, or because I always have and it's just a steady state? Do I love you, or your attitude, or your way with words? Do I love the way you make me feel or the way you make me think or the way you think, or...?
I love each person as much as I can love that person. I can't compare how much I love A to how much I love B. It's a funny thing, this love.