I'm not interested in apologetics.

I explained the situation, as this, that and such and such, but they just nodded along without showing much interest.

Really? You didn't show much interest before. I wonder what's got into you?

My son? He doesn't seem to be interested in classical music. I always hear some loud music coming from his room, though - techno, electric, or what have you.

Independence? I'm not interested.

Don’t bother explaining. Because I’m not interested.

"Do you have a boyfriend or something?" "No." "Someone you fancy?" "No, I'm not interested in 3D boys."

I am not interested.

We're not interested in such details.

Tom isn't interested in Mary at all.

Honestly, I couldn't care less for hot chips.

Tom isn't interested in me. It's you he's in love with.