He asked me if I could help him study but I was busy.
Were you really busy or he did something wrong?
Not really. I was just busy with some of my work.
I guess it's good that you told him the truth. I understand you were busy with your own stuff.
Oh yeah, I guess it's good that I didn't care.
Well even if you can't help him, he's your friend and you should still care as if you don't, then I don't think he can call you a friend and you may end up losing your friendship with him as you did not really care about him in the first place.