It's about a guy who turns into like a cat and tries to suck the girl's life out through her mouth. I saw it YEARS ago and can't remember the name. Please help.

Steven Kings "Cats Eye" film (it's like three stories involving cats), the last segment is where a dwarf like character is sucking the life out of a girl through her mouth, but the cat tries to kill it. That is the closest I can think of.

Na I think you mean steven kings sleepwalkers

Sleep walkers is about the mother/son vampires I believe.
I'll never forget Cats Eyes, with the "Quitters Inc segment.

The name of the movie you're looking for, Sandi, is "Sleepwalkers"
This is one of my FAVORITE movies... it's about a mother and son who are sleepwalkers, or cat people, who feed off the life force of virgin females to stay young. The scratch of the cat is deadly to them, which is why they strongly hate cats in the movie. Hope this helps! :)

It's sleep walkers I love that movie he can change the color of his trans am as well great movie