How does a girl know if someone loves her or not?
If someone loves a girl, they would express it with one of two things, Candy or Flowers. If you have not received either of those, then you are definitely not in love. However, if you have received them, then you still might not be in love. They would compliment you and seranade you outside of your window either at night or in the early morning. There are a few basic songs that they would sing to you. It's only love if it's one of the following:
Anybody else but you(Juno)
My Girl (the Temptations)
I want to hold your hand(the Beatles)
Sometimes (Brittney Spears)
God Must Have Spent A Little More Time On You (N*Sync)
Hope That Helps :)