Love is complicated to say the least.. It's an emotion that surpasses anger, happiness, hate and every other possible feeling.. It is intense enough to make you feel alive, and painful enough to make you want to die..
It's difficult to control.. It can be for anybody or thing and of any type, platonic or romantic..(Cowtao said it best) It makes you do things you never would.. It makes you happy and sad.. It defies reason..
It makes you feel safe when you are with the ones you love and scared when they aren't around.. You want to protect them from everything yet know that they need to be free..
It means having absolute trust for someone, and caring about them over yourself.. It also ends up hurting like hell when these things aren't returned by that person..
More importantly it just means giving your all.. Spending time with that person and always being there to support them.. Helping them in life and sharing their happiness and sadness..