He was sort of in love with Kitty since the end of GE. During that council meeting he's thinking about her as his own. Though it's more of a guilty obession.
And he simply thinks Jane is pretty. He isn't in love with her. More like lust.
And she simply wants him if he's on top, as stated before.
"You belong in Gryffindor,
where dwell the brave at heart,
Their daring, nerve and chivalry
set Gryffindors apart."