Kissing can be a lot of fun. Don't think that just
because you kiss a guy you have to do anything
On the other hand, once you're kissing
passionatley, you might both feel like going further.
The best way I know to avoid that is to kiss
him in a semi-public place. If you kiss him in
a movie theater or on your front porch, you know
it's not going to lead to sex right there!
On the other hand, if you're sitting on your bed when
your parents aren't home, there's not really anything
to stop you, so it's something you might want to avoid.
I'm not trying to tell you how to run your life, just
telling you what's worked for me.