It depends on the situation. Sometimes it’s hard because we’re having so much fun but we need to address other responsibilities (“I’m having so much fun at this party but I need to leave because I’m working in the morning.”) Sometimes it signals a huge change in our lives, e.g., when you graduate and move on to a whole new world. It’s scary to leave behind the safety and security of what you know and enter the unknown. And it’s sad because you’ll be leaving behind some people too. Change can be difficult, but change can also lead to new adventures and opportunities and growth. I’ll end with some wise words from A.A. Milne and Walt Disney that may help to provide some perspective. “How lucky I am to have something that makes saying goodbye so hard.” “Goodbye may seem forever. Farewell is like the end, but in my heart is the memory and there you will always be.”