Life is a two ways process.
Anyone realised it?
We often say I hate people to "use" me.
"They only come to me when they need help and stuffs."
Think a step deeper, aren't we are doing the same way they are doing?

Why we have friends?
Aren't friends are place to find fun, comfort and also share our stuffs.
We find them only when we are looking for those otherwise we won't look for them neither we will treat them as friends too.
Aren't we?
The problem is what is the degree of "use" that we can accept?
Nothing is balance actually or in another word nothing is perfect.
So, friends just bare this in mind that there is limitation in everything.