A cuddler. Someone you can cuddle -- *snuggle* -- with. Usually someone you know well, and where the relationship dynamic is such that there isn't (too much) sexual tension.
She's my snugglebunny for after scary movies when I can't sleep.
We both had recent breakups, and decided we were both cuddle-deficient, so we decided to be snugglebunnies for a night.
one who loves the snugglelumps and loves snuggling with him. They live in snuggleopolis where all the snuggies gather, on the planet snuggiopiter in the snuggie way. Great snuggieness resides.