I feel insulted when my boyfriend asked me to do HIV test, what is he thinking about?

My boyfriend and I are together for 4 years now, we've lived together for 3 years and everything is very stable and we talk about our future and marriage. Yesterday he heard a story about a guy getting infected with hiv, and he asked me to do one over Skype (he was at his mom place in another country). He said that the conversation will be awkward to talk about (because I had several one night stands before I met him, when I was 16-18 and not all were protected sex). It's reasonable that he asked and I think I owe myself and him but AFTER 4 years? I felt a suddent swollen throat from insult, I can't change history and I know it was stupid but I've never, ever slept or even touched another guy after him... it hurts my feeling... what to do?
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Thank you for your fast reply. So I'm being depressed about nothing? He said he's getting tested tomorrow there because the hospital is close and convinient. Also, he told me about his past experience and he's brought up that he 'went down' on a girl before (vonluntarily), he usually don't do that unless I ask him to, and I think in general he's not so interested in kissing/licking my v. and now this came up so I am really wondering if all those times he might have been disgusted? can that be?
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I feel insulted when my boyfriend asked me to do HIV test, what is he thinking about?
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