Guys, My boyfriend is really hurt over something I said?

It all started when i told him “everything i say i mean it” and he told me “So i’m the smallest you have seen” (He was talking about his penis size) and i was clearing up that i never said that so he said “But u never said i was the biggest either” and i started avoiding the question and telling him how i only care about him and he’s the one who makes me feel all these stuff when we’re in bed and blah blah (I was a virgin before i was with him) which made him be more curious about it and i ended up telling him that he wasn’t (BIG MISTAKE, i know it) after that he told me to leave him alone and i kept on being stubborn and not understanding why was he so mad. He called me really mad that he started crying and told me he was about to break up with me and explaining why it hurt him so much that i finally understood and i felt super guilty. I just wish i lied to him about it because when i told him that i really didn’t see it as a big deal since my mentality was just telling me that i never cared about the other guys sizes because i think my boyfriends size is perfect and i tried to explain that to him. I just don’t know what to do and i feel really guilty knowing my boyfriend is having a bad time because of me.
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He also said what got him more pissed off is the fact i kept rubbing it on his face...
Guys, My boyfriend is really hurt over something I said?
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