A year ago I tried shooting hoops with my nephew and he didn't like it. Now he's on the school team. I say to his dad:
Seems like he likes basketball now.
Is this okay?
Shouldn't there be an 'it' before 'seems like'?
not a teacher
It's grammatical in colloquial speech or writing. Leaving a subject off when the subject is obvious is common in some phrases:
"Looks like rain"; "Happens all the time".
However, don't take this as advice to leave subjects off. You have to know when it's acceptable, and that comes with experience.