I Love Her Even Though She\'s Involved with Someone Else

This is an awful feeling.  She says she's happy with him, yet we feel so warm when we're talking, and it just feels so right.  I could feel her sadness when I left, because I knew she was sad and concerned for me because I was sad.  She is the sweetest person I've ever known...I tried not to get attached but I can't help it.  I hope she's well...she works so hard...