Who did Serena lose her virginity too?

It was definitely not Nate in the mostrar like it was in the books, as we know that in the mostrar she had sex with Nate during Sophomore Year, but she made the quote in 1x12 to Dan;
"In Freshman año I dated the swim team captain, and he gave me a key to the pool so we could go and.... tu know..." (clearly hinting sex)
So we know por the time she had lost her virginity during/possibly before Freshman Year.

We just... don't know who to...

Damn, now I want to know! Hahah!

Ya I think Serena was suppose to have lost it to Nate in the pilot but when it came down to it the mostrar became way different then the books. For sure Nate lost his v-card to Serena @ the Shepard wedding (Chuck dicho it), Blair lost hers to Chuck jr año (limo ride any1), and Chuck lost his to Whoregina in 6th grade (Blair dicho it). That's all I know sry.

in the libros she loses it to nate but in the mostrar ,don't think so .it might have been carter baizen ,just guessing here ,i have no proof .

In the libros it was nate but in the mostrar I HIGHHHLY doubt it, its some misceláneo that we don't know.

It's never really revealed who Serena loses her virginity to.