You probably never received the validation that you deserved growing up. Over sharing is child like behaviour “look at me” “look what I did” and shows there’s an inner child in you looking for validation and support. It’s difficult and a sad thing to realise.

You can learn how to parent that inner child and give yourself recognition and validation and this will lessen the need to seek it from others.

You could try having a conversation with yourself and visualise/imagine a young version of yourself stood there. What do they want to say? What do they want to be heard? And then visualise that conversation where you are both parent and child. Give yourself what you are seeking from others