Please relax
If you really feel unhappy
I think that you should find the thing that you want to do
You said that you don't have any friends but I also don't have too much friends and I always feel unhappy but I won't cry as I will work (finish exam paper) about 8-10 hours and then I will feel happy
Also connect other or not is depend on you
you should via the web to make more friends
Please remember
Life is only one
Please keep it