this is a hard one there is such a fine line. all i can say is that i have a 7yr old son who is very much the same when he was 6 he was always trying to kiss girls to the point where i had to sit him down and tell him that while its nice to show people that you like them, he should not kiss eveyone.he has taken it well in the last year it has not really been a problem not sure if that is because he has grown out of it or because of our little talk, trust your gut feelings if your not happy try talking it out with her.good luck