Feel lonely

After a long time, I came back to home.
I don't know why, but I feel lonely soon after I am alone.
Loneliness suddenly comes to my heart.
I share almost all time in a day with my friends, talking a lot.
It cannot be true that I feel sad because many people help me whenever I come across a difficulty.
It can be sure that I am living a happy life.
Why do I feel so strong lonely that I can't bear by myself?
I might not tell anything I really want to tell.
I might not say my real feeling.
I might forget to feel things as they are.

I know I should have a positive mind however hard a thing I come across.