Why guys don't believe me when I tell them I'm a virgin?

I'm 23 years old and I've never gone out on dates, I've never had a boyfriend and I haven't even had my first kiss yet. (obviously I'm a virgin). I never felt desperate to do it as a teenager but over time I noticed that boys always passed me by and treated me like just their friend, to the point that sometimes I felt displaced and ignored by them even when I was interested in or attracted to some boy. , has a girlfriend or is not interested in me and I simply walk away and respect his position. I was talking with some friends from college the other night and suddenly they asked me why I didn't have a boyfriend. I explained to them that I never had the opportunity to experience anything with anyone because no guy has ever approached me with that intention or at least shown that kind of interest in me. For them it was like I was lying to their faces because there was no way that "a girl like me" was a virgin at my age or that I had never had a boyfriend, much less had my first kiss. Why is it difficult to believe something like this?

Why guys don't believe me when I tell them I'm a virgin?
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