My boyfriend talks about his ex when he's drunk but assures me he has no feelings for her. He keeps unblocking her from Facebook to see what she's up to. Should I be worried?

I am age 57, mentally disabled just looking to answer and ask questions, I live on the East Coast of the United States of America I try to give positive advice and keep things for real and I expect the same treatment in return have a Blessed day hope God Blesses your day with the best of health, happiness, Many Blessings.