Don't look back

Keep moving forwards, don't look back, that's the past, focus on the present. The past is over, it was amazing, it was sad, it was the best time of your life, so far anyway. Don't forget a moment of it, but don't dwell on it either. Move on like everyone else, try not to hold grudges. You don't have to forgive them, just act like they don't exist. Seize the moment and be spontaneous, make as many mistakes a you can, you'll learn much more from them than from anything else

Smile as much as you can, even if you don't mean it, one day you will.