Mental health is the state of ones mind in their thoughts and actions. Ones emotional health is how one feels about different things and how he handles these emotions.
it's def hard, it will a very long time to heal. But once you get over this learning phase it’s easier to analyze why you were wrong. It’ll be easier if you blame yourself instead of the other person because thinking about the past will only hurt you more.
take time to grieve & cry
I believe the answer to your question will be atrioventricular but don't cross out pulmonary it could possibly be the answer.