He is still following his ex social medial accounts. What does that mean? 10pts?

[Annie]

My crush broke up with his ex 6 months ago.
His ex unfollower all of his social media accounts. However, he is still following her Facebook, twitter and instragram.

His ex is following his sister's instragram. Today, his sister posted the picture of him and her together in the Christmas party. I saw his ex liked the picture.
She liked only the pictures of his sister with him.
She also liked every single pictures on his own instragram

My question is:
Does he still like his ex if he is still following her social media accounts?
Do you think she still likes him?
P.S. His ex is friend with his sister.