To love him (her) is to tolerate him, understand him, support him, like him, be happy for him, grieve for him, share his worries and worry about him. In fact, love is very complicated, and it can't be explained clearly in a few words. Don't think I know a lot. Actually, I just know a little.
You must give your heart so that she can feel it. Distinguish between loving him or her and loving yourself. Many people actually love themselves, their feelings, their sense of honor, their satisfaction of being appreciated by others, their vanity of being envied by others, and their physical satisfaction from each other.
This is not love! Love is selfless giving.
The most important thing is to give your heart!