I feel like a slut? :(?

I'm 19 years old, my boyfriend is turning 20 soon. We've been together for almost 2 and a half years. Anyway, whenever I do anything remotely sexual with him I feel like a slut:/ We haven't even gone very far...he's never even seen me completely naked, all we do is heavy makeout and hj/fingering. Is that too far??? Should I feel this way if I've been with him for so long? I want to wait until marraige for sex.