This discussion may contain spoilers!
This has been discussed billions if times but i am certain TTG are making us believe that it is Kenny who Clementine sees in the ep2 preview but the more i think about it the more i think it will be the guy you give or refuse water too. Why else would this be a choice if it wasn't going to be relevant? Either that or yeah it could be Lilly or maybe Christa.
Apologies as i know this has been discussed many times