I know this is really long, so please only answer if you have time?

your still angry because you cant completely forget about a person that burned significant images and memories into your head yes you can ignore him and not cast him in your play which is the right thing to do but there will always be reminders in life of him or from him that still make you irritated its a natural feeling ecspecially if youve spent time effort and feelings on him only to get nothing in return but hurt, in these times just try to stick to your guns ignore the fact that he stares at you and just remember your the better person for not letting him pull you down again. All you need to think of is that someday your going to find someone that likes you as much as you like them and that person wont betray your trust or falsely lead you on