I used to be the same way myself, but one day I decided to be more decisive. I figured I was only causing myself pain to analyze and hang on to a relationship which was not good for me or not wanted by me or the other person. Now I am able to walk away and not look back. It's probably not normal to keep thinking about it after you are done, but old habits are hard to break. Try to focus on something else.

Remember, your first priority is to take care of yourself, and if a relationship of any kind does not seem right, do what you have to do.

(I understand the curiosity thing...the first time you delete without reading is the hardest. )