Lots of petting, talk to your kitty in a sweet voice, be a good alternative to a napping spot - ie, have a comfortable lap or always make room for the kitten to snuggle next to you. Find the one thing your kitten or cat loves the most, some cats love belly scratches/rubs, back scratches, others love shoulder scratches or to be scratched about the tail.
Clingyness in a 2 month old is normal, he may grow out of some of that. Or maybe not.
I have an 8 month old that sleeps on my chest and a 4 year old that snuggles close whenever I sleep.