Let your Past go
Something is holding you back and it may be your thoughts and feelings. Try to let these go, otherwise you will create more of what you don't want and create more of the patterns in your life due to your emotions from your past.
Your Angels forgive you for those mistakes occurred and they ask you to do the same and forgive yourself and let go. Whilst this may be painful all you are doing is creating more and more of the habit and in fact making you ill.
It doesn't mean that you need to be around the person but you must try and forgive and move on.