robonski15:

That's what's on my mind right now.. I have spent heavily on her.. How do I send her packing and what excuse should I give to her for quitting.. Or should I tell her bluntly abt she and the guy

I would be honest about how you feel and just ask her . I mean , what do you got to lose ? Of course, she could lie . Do a google search for how to read facial expressions and tell if someone is lying. Might help you. If you have feelings for the girl , just be honest. easiest solution.