Some practicalities - get a good night sleep, being well rested and alert will pay off huge. Show up a bit early, plan it that way incase traffic or something happens you won’t be stressed about being late (you have enough stress already don’t add to it). As for stress, let it go. What will happen - will happen. You are prepared and ready, I do not believe cramming for an exam works. Be sincere and remember why you are there, keep it together you are way stronger than you are giving yourself credit for.
Feelings are fleeting. Be better, not bitter. Love the person, forgive the sin.
