Perhaps what i've done is of no use,

i somehow felt that what i've done is not appreciated.

Or it just shows that i'm not a good friend.

I really don't know how to be a good friend,

it's difficult.

Especially when you know that what you've done is not up to expectations,

or when you know that the person doesn't need you at all.

I really don't know what to do.

I really treasure this friendship,

but i can do nothing about it.