Empathy,
I know axcatully what your talking about, I think there is a big diffrance in making love to someone vs. having sex with them.
Sometimes I think a person dosent really know this unless you are 100% in love with that person and the feeling comes back to you.
it is very special, I myself have never felt that except with my Ex G/F. For 3.5 Yrs.
What hurts the most is when you find out they having been sleeping around, And then you wonder how special was it??
It drives you Crazy...The hurt, Betrayl.
Sorry about that part, But yes I do know how it felt for you.
Good Luck.