He broke me for the last time

He chose another girl over me our family our relationship of 11 years. I feel like a female is never jealous or insecure in a relationship unless your partner is seeking attention from other females. I'm having a really hard time sleeping letting go eating even though I know everything he did to me is wrong im torn to a million pieces to think he just threw all this away. He turned everything around and blamed me he left us instead of him apologizing for me catching him talking to other girls he left me

I need as much support strength encouragement.