I'm good at playing football, that's why i play in the school team.
I'm not good at singing, I don't have a proper voice for it.
I'm bad at playing piano, I can't move my fingers properly.
I'm bad at english, that's why I ask someone else to do my homework. ;)
I'm crazy about you, I can't stop thinking of you.
I'm crazy about playing computer games, that's my hoby.
I'm fond of her.
She is too fond of books.
I'm interested in history of Poland, I want to know what has happened in the past.
He's interested in computers, he knows a lot about computers.
I'm bored of maths, I can't stand maths lessons.
Are you bored of me? I hope you aren't.