Do girls like being tickled?

im 18 and my girlfriend is 17 and we've been together for 3 months. we make out on her couch a lot and whatnot and when we stop we just lay there and cuddle. often times i will tickle her sides or kiss her neck to tickle her and she laughs and laughs and laughs while saying "stop it!" but it doesn't SEEM like she hates it. But i worry a little that she doesn't like it. What do you guys think? do you like being tickled on the waist by your boyfriend or a guy in general?