Desire without love?

Of course! You can have a really strong sexual attraction for someone you don't love, you might not even like and you certainly wouldn't want to spend the rest of your life with! Sexual desire is a strange science - there's no logic to it whatsoever! 

You shouldn't be ashamed of fancying someone you don't love - we're not responsible for our feelings, after all! You just have to learn to control your desires. A really strong attraction between star cross'd young lovers in can lead to terrible tragedy, and not just in fair Verona...