(GIRLS HELP) I love to snuggle with my girl on the couch. What else can I do?

I'm a 17 year old guy, and I'm crazy about the girl I'm with. We snuggle all the time on the couch at her house since it's summer and we just lounge around doing nothing, but I love it. Usually I just graze her arm with my fingers or stroke the back of her neck until she falls asleep in my arms. What else can I do? I love snuggling with her but am unsure of what else girls like when they are in the position. Any suggestions? I know the back of the neck is a good spot to touch. lol. Thanks so much for the help!