"I LOVE YOU" means that i accept you for the person you are, and that i do not wish to change you into someone else. it means that i will love you and stand by you even through the worst of times. it means loving you even when you're in a bad mood, or too tired to do the things i want to do.
It means loving you when you're down, not just when you're fun to be with. 'i love you' means that i know your deepest secrets and not judge you for them, asking in return that you enough to fight for what we have and that i love you enough not to let go.
It means thinking of you, dreaming of you, wanting and needing you constantly, and hoping you feel the same way for me. When you truly care for someone, their mistakes never change your feelings, because it's the mind that gets angry but the heart still cares.