Most Helpful Girl
I think you should just be honest, if she's as into you as you say she will be upset and hurt regardless, there's no way to sugar coat it. It's better to be open and honest in these kind of situations, dealing with it in a dignified way shows that you respect her as a person. Procrastinating and dragging it out could be seen as you being cruel and thoughtless even if it is unintentional. I've been in there myself and from experience I would rather of been told the truth than made to feel worthless and disrespected.
Most Helpful Guy
Just spit it out (in front of her) Okay,
It will hurt her the movement but in the end of the day its good for both of you and one day She will respect you for this.