graduate school - How do I convince my professor to keep me as his student?

This is a continuation of my previous question, I believe my advisor doesn't think I am smart. How should I deal with this?

It just so happens that when I asked my prof for feedback, he decided to just drop me. Obviously I had asked for feedback when I saw some signs recently which indicated that he wasn't very happy.

Now what do I do?

I really liked talking to this prof. I was enjoying the discussions. I thought things were well. But he seems to think that I get stuck with simple things! He probably also thinks that I am overambitious (in the few instances that I have tried discussing some other topics with him).

I wrote to my prof asking him to reconsider his decision and reflecting on what could be the issues of his disappointment and what I could do to improve. Obviously he didn't reply.

I met the grad coordinator. He has schedule another between with all three of us.

I wonder whether I should be optimistic about that meeting!