When there is deep love, you always tend to feel that you have not done enough. If you ask any mother, “Have you done a lot for your child, or all that you had to?”
She will say, “Oh, I don’t think so. I feel I have not done much”.
In love one never thinks “I have done enough”.
That only happens when you get very tired and exhausted. When you have this feeling, “I have to do more (for someone)” then that is a sign of love.