You need to learn to let go. It's never easy and it will hurt, but believe me afterword you will feel much better.
If you don't let go you will forever be stuck chasing that butterfly that can not be caught.
If it is someone close to you, by all means share your love do what you choose, but when that person changes their mind do not feel hurt. There are 6.3 billion people in the world there are so many people you have not met.
Learn to let go.
If it is something that you cherish, something that reminds you of an event or a memory by all means keep it, but if it is broken or lost do not be too crestfallen.
You can always find something else, write it down, find a song, these memories will never be gone, just in a different form.
Learn to let go.
You may love them so much but there is a time when you must let go.
Think of the turtles, they have jumped over hurdles, risked their lives all for their eggs, but when they are laid, the turtles leave. Mother nature has learned to let go and it is beautiful and stronger then ever.
Learn to let go.