Dude,

First of all, you've made a big mistake. If you know she is Caleb's a.k.a. your boss' mistress, why on earth did you ever give in to all her invitations? What on earth were you thinking? Do you even know what you've gotten yourself into? What if your boss finds out? Would your job be at stake? How would he treat Sandy? Would he hurt her? Do these questions not even go through your head ever?

Secondly, if you really give a damn about her which you do, tell her how you feel. Step up your game. Don't ***** out. I know your situation is complicated which I, myself, have had experienced that before. You always ask yourself that question "I really enjoy having her around, but what if it is all game, I just don't want to let her in and let her walk all over me, I want more but I am scared." When you really love her, you would trust her entirely. You would give her all your heart believing that she would not break it. The mere fact you have come to where you are now, don't retreat. Tell her what you want, your feelings towards her, and etc.

Last but not least, ask yourself this: Would you sacrifice everything just to be with her? Or would you just choose the easy way out? Think it through. Don't rush. I wish you all the best bro.

Peace.

not yet kongkek ar?