I've been friends with this guy for 4-5 years. In recent years our lives have taken very separate paths so we really only keep in touch via Instagram. He also has BPD which I found really helpful: l felt like he understood me and all my "quirks"... But a few months ago I realized our friendship was unhealthy. He really only messaged me when he needed something from me. I always reached out to him to make sure he was okay and checked up on him because he is sometimes suicidal. But whenever I needed a friend he basically ignored me. 

When I realized that this was a one sided friendship a few months ago, I decided to unfollow him on social media and go into no contact. I hadn't really thought of him until today. I decided to look at my followers, and I saw that he unfollowed me, too. This is totally dumb but I'm actually sad that he unfollowed me. What did I expect? 

I think it's probably a uniquely BPD behavior to recognize that someone shouldn't be in your life, take steps to remove them from your life, and then feel sad and somehow rejected/not good enough when they don't chase you down or fight to be a part of your life. So dumb. I wish I didn't feel like this. 