How did you cope after ‘breaking up’ with your best friend?

LEMME TELL YOU LOL.

My ex-best friend was with her fiance for about 2 years & unfortunately their relationship was falling apart quickly. She decided that she was going to fall it off & I went to visit her to comfort her & support her in her decision (I live 5 hours away). She broke up with her fiance after the visit & then decided to sleep with my ex-boyfriend that I dated for 5 years (& had been broken up with for about 4 years at that point)... TWO DAYS after her fiance & her broke up. NOT ONLY THIS, but she:
a) lied to me about it.

b) tried to make ME feel bad by saying "I was a shitty friend for thinking she would sleep with my ex

/r/AskWomen Thread