The feelings of wanting to be alone, are in a vicious circle with depression. The only way to get out of it comes down to you. How much you want to change the quality of your life. You realize you want friends, and to be take part socially in what goes on around you, you will have to step outside of your comfort zone. it will be tough, and uncomfortable at first. But it will be the first step in opening your world up into a more happy place. Everything is better when shared.

fighting depression is sure hard. Many teenagers today are suffered depression.

you are definitely sad about the changes in your life .. I don't think you are actually "sad" .. i think you are just very nostalgic about the thing which going on..

I went through the same when i passed out of school to college - new environment , new friends ...( but not as good as the old ones)

Yes, it happens .. and its sad that it does ...

Dude,
Simple as this
Get a dog.
They will give you love
attention
and be the best friend ever.
I saved my dogs life, little did I know, she saved mine and made mine!
Trust me, and make it work!
Go to the shelter, and find your happiness!

You can meet other people and make friends with them in different places, like in the gym, you can make friends there and you can have a good health a fit body. Just give a try to go out sometimes it can help you to ease your depression

Dont beat yourself up ,we re all scared, join groups that share your interests and the friends willfollow