41. No one knows me like you and no one ever will. Happy birthday to my first and forever friend.
42. Thank you for all the years of friendship, sis. You are my best friend, and your loyalty is always appreciated. May your birthday be filled with wonderful surprises and amazing gifts.
43. Sibling love like ours is rare. I’m so glad we share an unbreakable bond. Happy birthday to my sweet sissy!
44. I wish you all the happiness your birthday can hold, my dear friend!
45. You’re the sunshine on a cloudy day. You brighten our lives and we’re so blessed to have you in our lives. Happy birthday, dear sister.
46. Sisters are more precious than anything. Thanks for always being my best friend and role model. Happy birthday.
47. Whether you are near or far, you are always close to my heart.
48. BFF means Best Friends Forever but do you know what SBFD means? It means Sister but Best Friend in Disguise. Happy birthday, #SBFD.
49. I am so lucky to have such a sweet and wonderful sister like you! I hope that your day is full of joy, and that you have a very special year ahead. Happy Birthday!
50. Sisters rock and I’m so thankful to have the absolute best. Happy birthday.
51. Sister: A best friend for life. Dependable through thick and thin.
52. Sisters like you are diamonds. They sparkle, they are priceless, and they are truly a woman’s best friend. Happy birthday, sis.
53. You continue to be my biggest inspiration. Happy birthday, sis!
54. I love you to the moon and back. No one shines as brightly as you do, sister. Happy birthday to my twinkling star!
55. Wishing you all the amazing and great things life has to offer.
56. Friends will make us laugh, lovers make us smile, but sisters are one who stay back and wipe all the tears!
57. Sending birthday love to my amazing sister-in-law!
58. I know that I am stuck with you for life, but even if I were able to pick another sister, I would still pick you. You are such a wonderful person, and I am so glad to be your sister.
59. Sisters help you find important things when you have lost them. Things like smiles, your hopes, and your courage.
60. The best sister and best friend I could ask for! Love you so so much!