Obviously!
Ginny Weasley, ofcourse
It is really Ginny. She is Ron's little sister and is in love with Harry Potter.
Harry Potter happens to be in love with Ron's little sister Ginny. But Ginny is dating Dean but ditched him and loves Harry. Hermonie is in love with Ron but Ron's girlfriend named Lavender. He ends up not really liking her and breaks up with her. Ron likes Hermonie but doesn't say anything!
Harry Potter.
No
Yes
Yes, Ginny and Harry later got married and had three children.
Ginny was infatuated with Harry Potter from the time she met him, at the start of Book 2.
No , they only love each other as friends.
They are in love and eventually marry to have kids.
Exactly 78.5 love-unit.
Harry is first in love with Cho Chang (books 4 and 5), later with Ginny Weasley.