I've been depressed for 3 weeks, what should I do?

Hello everyone I have been feeling quite strange sense February 16th. I went to a Chinese restaurant and bought some food alone. I can remember feeling anxious, tired, and depressed there and back. Before I got home I went to get some gas... when I got back in the car I felt alone. I really desire to have a family but I don't currently have one. When I got gas I drove home, sat at the kitchen table and cried when eating my food. For some reason I began feeling trapped in my thoughts and feelings. I tried sleeping but I couldn't fall asleep then I started to feel derealization. It's now February 22nd and I am still feeling this way. My gosh I just want to live well and prosper. Am I going to snap out of this because I am young?

Sorry to hear u feel like this I also get like this but I have a family but don’t know why I got like this I feel alone most the time 

Hi james, i used to feeling like that. Hell, i still feeling that way now although i'm able to control it a bit now. Doctor told me to go exercise, go for jogging. Go outside early in the morning and exercise. Being alone sometimes can trigger anxiety. Socialising can help so you don't feel alone. Do something fun and go refreshing. Stay positive because it's really important. Do spiritual thing if you hv beliefs in something. Sometimes we needs something other than our own world to hold on to.. Best of luck!