HIV transmission from sharing saliva?

I am a 41 year old female who has been in a loving monogamous relationship for the past 14 years. Recently, at a party held in my office in my honor, I was holding a lollipop in my hand that I had been sucking on when my male co-worker grabbed the pop and sucked on it. I was distracted and when he placed it back in my hand, I immediately placed it in my mouth before I had realized it was just in his mouth. My other friend said he had placed the whole lollipop in his mouth. Although he is a dear friend, he is a male slut and now I am worried about getting HIV. I could not possibly ask him if he has any diseases. We work together. What do you think? I appreciate your response.