Hey! I know this happens to a lot of us..so be at ease first ..take deep breaths , if you want to cry ..cry ..vent it out..then close your eyes and think , what is bothering you the most ..write in a priority list ..and then set a daily little target to go up and solve that issue ..take help if you need so
You ask your trusted ones to help you figure out what's bothering you.. sometimes others can help us in that sense
What happened, may be try to socialise with your friend for some time.
Try to find out blessings n happy moments n get positivity