I unfriended WS too. I couldn't stand to see the posts about his happy new life. I unfriended MIL, FIL, SIL, and BIL too because watching them rally around my cheating WS and support him was more than I could handle.
It't a good form of detachment, which is very difficult to do. Once I set the detachment wheels in motion the momentum carried me. I moved out, moved on and started to enjoy life again. If you can just stay off of FB, but for me its how I keep in touch with my family.
M 21 years XW 43yo, me 41 yo S13 BD March 2016 - she asked me to patient... End of June - I started the D process. D final 2/23/17 "He who forgets will be destined to remember" Eddie Vedder