I don't want to go on holiday with my family
Why don't you want to go on holiday with your family?
I would rather go to an island with my friends
You need to learn to enjoy time spent with your family. Your family will expect you to go on vacation with them. If you do not go with them, they will feel hurt and unappreciated.
I don't know if that's going to change my desire to go to a tropical island with my friends.
Your friends will be around for a long time; your parents and grandparents won't be around forever. When you have children, you'll realize how limited and precious time is -- and why going off with your friends will be forever lost opportunity to bond with them and bring some happiness into their lives.