Is my boyfriend really my boyfriend?

my boyfriend and i started as friends with benefits. 2 months later, i asked him out to which he agreed. it’s almost a year now and no one knows we are dating. ONLY THE TWO OF US knows… sometimes i get curious and ask how he ended things with his ex cause he asked me and i told him truthfully but whenever i ask him about his, he gets furious at me and makes me look like a fool. so i stopped. today i asked him why people can’t know we are dating and he firstly said. he just doesn’t want anyone to know (which i know is lie, cause everyone around us knew his ex) then i told him to tell me the truth and he said there’s a real reason but he won’t tell me. so he’s been sulking all day cause iㅤ asked, he’d rather give me the silent treatment than tell me. i was mad and ignored him.

im lost asf

P. S i don’t know if this will help but he’s chinese and i’m black. could it be because of the differences in our races? or?

Updates
+1 y
i asked him again and i said if he doesn’t tell me i’ll take it as though it has sth to do with my skin color and he told me to think what i want he’s not telling me the reason.
Is my boyfriend really my boyfriend?
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