They're brother and sister.
So...no. They probably do love each other, but as siblings, not as partners.
They love each other because they are brother and sister!
No. He did not. Why would he jealous the love between his sister and Caspian.
Peter only loves Wendy like a boy loves his mother.
Susan stops believing, so never returns. In The Last Battle, Peter, Edmund, and Lucy all die in a train wreck but live in Narnia forever.
Peter Pan isn't capable real love, except for himself. Because he never grows up, he can never think of girls or women as anything other than mothers, and he doesn't properly understand what a mother...