I still cry about cutting off communication with my ex best friend
It sounds like you miss them. Why did you cut off communication with them?
I felt like I was developing romantic feelings for them.
It can be hard to handle friendships, especially when there's romantic feelings involved. If you miss your friend so much, you should try to get in contact with them. They probably miss talking to you as well.
You are no psychologist.
I am sorry if I upset you with what I said. I am just trying to help by letting you know that it's perfectly normal to miss your friends that you don't speak to anymore. It's never too late to try to get someone back in your life though!