Be easy on yourself. Of course you're going to miss the drama and having him as the focus of all your thoughts and energy. Readjusting will take time. Use all that energy to put the focus on you and what you want to do with your life. You have all this spare energy now that used to be wrapped up in him - find something to do that you enjoy - something just for you and treat yourself! Have some fun! This is an opportunity to put you first.