Is it my mistake?

I’m not a stone
I’m not a thing
I have a heart
I have a sensibility
I want composure

That was not my destination
I well of wrong manners
Properly, I shouldn’t choose him to be my brother
That was my mistake

Sincerely, my feeling was painful
I love him because he was my brother
Nothing else, nothing special
But . . .
Why she interpreted it by another way?
Her suspicions are not well founded
I hate that mien

I beg pardon, should I?
Is it equitable?
I don’t know at all
It makes me confuse  