here's how i imagine bts being your best friend when you're having a problem

a thread;

namjoon would let the silence comfort you, he'll listen and would want to know about how you feel and he'll just sit there with you, assuring you with his presence and that he's always right beside you.

seokjin would comfort you with food. he'll prolly cook for you or would have a bag of food prepared when he comes over. he will eat with you and expect to hear some of his never-ending dad jokes to help you feel better.

yoongi would give you the best cuddles to comfort you. he might give you a lecture throughout the night but he'll probably keep you company till you feel better. (he might also peel tangerines for you)

hobi is the one to take you outside. he won't let you lock yourself in your room. he's most likely to pull you outta bed, drive you to a great and quiet place, dance lively in front of you to make you smile or laugh, he'll give you the best company.

jimin is good with words and advice, he will comfort you with his insights and tell you what's the best thing to do. he'll put you to sleep as he's beside you and you'll feel a lot better and fine when you wake up

taehyung will most likely bring yeontan with him to comfort you. he'll bring your fave comfort food, and will probably watch a movie with you. hugging you tight would probably be the first thing he'll do as soon as he sees you but will also tease you for being a crybaby

jungkook is that type of friend who'll consistently listen and would just stay quiet. after you let it all out, he'll sing you a song to comfort you, make you feel better, and also put you to sleep. his calm and angelic voice would calm you.