Why do I still have this stupid feeling?

I recently declined friendship with someone after more than 2 years. It was a toxic relationship – well, at least according to some people around me. I don’t feel very comfortable being with her either. But strangely, as we officially decline our friendship, I still feel very emotional. I have a feeling of “it can’t be happening. Why do we have to leave?”, something like I still don’t want to let her go.

She posted a status on Facebook, saying that she just wanted to be a friend in its true meaning, but I couldn’t get on with me because “we are so different”. She also seemed to imply that it was all my fault. She might just want to be friendly with me like she said. But sometimes her action seemed to point out that she wanted something other than friendship. At least other people frown upon her action. With all that in mind, I don’t know why I still feel so stupidly emotional. I know it is stupid and I want to get rid of it, but I can’t.