How fast is too fast?

My boyfriend and I have been dating for 7 months. Weve been friends for 2 years and we've made it to third base. I just don't want to be considered a slut. Any one else had this issue? Thoughts? I mean I know I love him, I knew from the first time I met him. And I know I shouldn't let people judge me, but I don't know. Please help, thanks!!!