Why can't i keep a friendship to last??

Its always me
Who everyone falls out with
But i don't understand why
They never usually tell me what I've done
Its always the most special ones that mean the most
They blame things on me

I wish I was a better friend
Maybe if i was
This wouldn't happen to me

I've always had something wrong with me since I've moved here
Everyone seems to have something against me
I'm not surprised
I'm fat
I'm ugly
I'm a crap friend
And I suppose I don't have a life
Well what do you expect from someone like me?

I can't help it if i have a crap life at home
my parents aren't here to keep me company
And my brother happens to hate me
I don't really have anyone to turn to
Too many people have things against me
But why me?
Why can't I keep a friendship to last??