Like, the only person that's thinking about you, is me, so...
only person's opinion
that you should really care about is mine.
What's your opinion?
Well, I love you.
opinion about sb
opinion of sb
opinion on sb
opinion on sth
your feelings or thoughts about sb / sth, rather than a fact
We were invited to give our opinions about how the work should be done.
I've recently changed my opinion of her.
Everyone had an opinion on the subject.
care about sth
to feel that sth is important and worth worrying about
She cares deeply about environmental issues.
I don't care (= I will not be upset) if I never see him again!
He threatened to fire me, as if I cared !
used to say that no other or others of the same group exist or are there
She's their only daughter.
We were the only people there.
His only answer was a grunt.