Right off I thought of Brokeback Mountain by Annie Proulx. Cry to Heaven by Anne Rice. The Lover by Marguerite Duras. Let The Right One In by John Ajvide Lindqvist is a different sort of love story!
i like books that have great characters and, if those characters happen to have emotional love portrayed well then i am fine with it. I don't normally look specifically for those sorts of plots though.