Love is true acceptance. It's when all of your little annoying quirks don't matter anymore. They're just part of you, and someone thinks you're great because of them, or the uniqueness of them.
Love is trying your hardest. It's giving service to others.
Love is doing your best to make sure others feel loved.
It's smiling at someone, or offering them a ride home, or being proud of their achievements.
Love can be romantic. It can be silly and fluttery and exciting.
Love can be serious. It can be difficult, heartbreaking, and life-changing.
Love can be simple. It can be braiding your sister's hair or reading your brother a story.