So my bff and I ended things when they got in a new relationship. We went from talking 24/7 to instantly talking once or twice a week literally after they went on the first date. 

That triggered my abandonment anxiety and I begged them to talk to me because losing them felt like I had no one in this world. I cried. I told them I'll even work in therapy to get over this attachment issue and just need some time to get over this anxiety. Things were good for 2 days. Then all of a sudden I woke up one morning and saw that I was BLOCKED everywhere. Without a word. I cried for a month straight and felt like the worst loser ever. 

I kept apologising to them on email and reddit, and they still didn't talk to me but replied here and there. Now fast forward to current time, they messaged me saying they wanna talk too and that I supported them a lot last year. I cried out of happiness and literally felt like it was the best day ever. However, they wouldn't unblock me anywhere and we need to just talk on Reddit. I felt heartbroken and literally couldn't stop feeling like I wanted to throw up. 

I keep questioning myself about how am I so replaceable? What do I do so wrong that its so easy to kick me out of your life and so impossible to take me back? I haven't heard from them in over 36 hours and it's making me really anxious that maybe I am blocked again or maybe they are mad at me. 

I wanna apologise to them again if somehow I was wrong. I just miss them so much. I still can't process how they went from literally being so supportive and like they cared about me more than anything in the world to overnight just not wanting to talk to me anymore? Why am I this easy to discard. Should I apologise to them if I offended them again somehow? Or if I made them feel bad? Please any help is appreciated. I don't wanna lose this person :(