My boyfriend like to chat our friend and flirting with her and reminding her of the best moments they had together. When I realised he promised to stop. Does he love her
I can imagine how you are feeling realizing that your boyfriend is still talking to her friend. I may not tell whether he loves her or not. It could be that he is interested with this friend and he just ensuring that the friendship stays by sharing their best moments, Whichever the way, since it is making you uncomfortable, talk about and you both agree on how to move on with the relationship.
Check out this article: https://lovematters.co.ke/news/friends-ex-dos-and-donts
Love Matters Team.