How important it is to have a good friend who can comfort you when you are in a bad mood. In fact, I think it is good for you to be by her side. In many cases, it is good for friends to be by your side. However, I still give you some suggestions:
1. You can accompany her for a walk, take her to a place she likes to play, or go shopping. It will be good for her mood. Relax her mood and walk around more.
2. Give her a small gift, a simple creative gift will be fine, a real doll of her own, the realistic and cute appearance will make her laugh, a cute little bear doll will also make her feel at ease and secure, don't girls like such little bears.
3. Eat some delicious food with her. Eating delicious food when you are in a bad mood is conducive to making you feel happy. Just eat more sweets. When a girl is in a bad mood, don't worry about losing weight.