Sometimes you fight, sometimes you have fun. That's a normality in your relationship. On his birthday, express your appreciation and how you feel for him. He will definitely love you even more but will still pick a fight with you.
He is so protective of you, his sister. But he will never dampen your dreams or stop you from doing anything as long as you're safe. Today is his birthday so take this chance to thank him for being such a great brother.
The brotherly love that both of you share is very precious. You have each other's backs and you can rely on him for everything. His birthday is around the corner so send him this ecard to show your appreciation towards him while telling him that he is always on your mind.