How can an adolescent who kisses his aunt's hand daily before sleep stop this habit which bothers his aunt, while preserving feelings of love and gratitude towards her?

The best of affairs are those in the middle. Excessive kissing of the aunt's hand has led to her disliking it. And love for an aunt is not limited to kissing her hand, but rather by offering her services and pleasing her.

The advice is: 1. Pray to Allah for moderation in all matters. 2. Be open with your aunt to learn what she likes and dislikes, and fulfill her wishes as much as possible.