Dear Isobel: What Color is Betrayal?

Dear Bel,
Just writing this hurts; it makes me think of what a good friend you are, and what poor substitutes I have now. You'll recall that whole David rant a few posts back? So, lets talk about the most recent development in this whole dealio; he is texting another girl, and I'll be damned if it doesn't feel like a bread knife in the back! Which is worse than a normal knife because its serated! OUCH! But it's not his actions that have me so torn up- he has every right to text other girls. I mean, I'm not THAT pyscho. It's really more the girl I have the problem with; enter the incalculable sense of betrayal. The girl he is texting night and day is none other than Annabel! (One of my closest friends, to the people of the internet). She had full knowledge of my crush on him and with little-to-no hesitation, she put the moves on him- and they worked! He even went so far as to say, AND I QUOTE DIRECTLY FROM THEIR TEXTS THAT SHE SHOWED ME ON HER PHONE, "I really like you, and I wish we could date, but we go to different schools, so it wouldn't work out." But, you know, with horrific grammer, as to be expected of most teenagers. I was heartbroken, and then to top the whole damn thing off, I learn that she had been planning to say yes if he'd asked her!
And I'd thought we were friends.
I'm not sure how to act around her anymore; for the moment, I've been playing it cool, acting like this whole mess hasn't affected our friendship. But this is not a new thing for her. She has tried the same thing with one of Lauren's old boyfriends and with my ex (WHILE WE WERE DATING.)
So Bel, what would you suggest as a plan of action? You know I have a hard time shunning people, or being mean unless its to protect someone else.
Here we are, in that same spot again. You gone, me needing you more than ever.
To explain the title- there are always colors associated with emotion (red for love or passion, green for envy, blue for sadness, ect.) So what color is betrayal?
You're in my heart and mind as always- wish on a star for me, would you?
~Willow