Is it bad that I don't care anymore?

Hello! I recently got married over a year ago. I have had this friend for awhile since then (around 5 years). She was a bridesmaid in my wedding and was a "best" friend. After I got married she really started being negative, judgmental, etc. towards me. All she would text/Facebook would be rude, immature comments, so I deleted her off Facebook and stopped texting her. She doesn't get it even though I say "stop being negative, you need to grow up and quit being immature, etc." I'm perfectly happy, and it has not affected me to lose her as a friend. I just was wondering has anybody else experienced the same thing or maybe what her problem is? If somebody has gone through it I want to say NOBODY deserved a person that puts people down in their life so sometimes the best choice is to lose a friend instead of being in a situation where negativity is making you feel bad... you don't deserve it!