Ugly Duckling syndrome?

Someone told me I have that . Is that supposed to be a compliment ? what do I take it as ?

The situation: I was talking to this guy I've known for like a year and complimenting his personality (he has great one and I tend to compliment people a lot) and all of a sudden he goes "Wow , you've got serious ugly duckling syndrome all the way " ... What? ... I don't understand and he was like "nvm".
+1 y
Alot of typos , I know . Apologize :D
Ugly Duckling syndrome?
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