harry and ginny coz they r perfect together and lilly in the end didn't even like snape as a friend! but i think this kind of questions r better as picks...
Snape fancied Lily but she didn´t love him back...besides Lily and James are a way btter couple than Lily&Snape. Poor Snape was in love with her all his life...
Harry&Ginny are meant to be together since the beginning...
