161. Having a sister like you is like having a third parent. Thank you for helping to take care of me even when nobody asked you to. Happy birthday!
162. Sisterhood is measured by the heart. I love you, and may your day be the best yet!
163. I know that no matter what, you will always be a part of my life, and I’m so thankful that I have such a genuine sister.
164. Friends will make us laugh, lovers make us smile, but sisters are one who stay back and wipe all the tears!
165. It's so wonderful having a sister like you in my life! I wish you all the happiness in the world. Happy birthday!
166. My best friend and mentor has grown a year older today. Wishing you a very happy birthday, sis.
167. I can't promise to solve all your problems, but I can promise you won't have to face them alone.
168. Wishing you all the amazing and great things life has to offer.
169. There is no problem that sisters cannot: confront, combat, plot against, ignore, make fun of, drown in chocolate sauce, or run over with the car.
170. It is so wonderful to have a sister like you. Have the best birthday, and I cannot wait for all of the adventures ahead of us!
171. To my sister on your birthday: May your special day be every bit as magical and wonderful as you.
172. I hope your birthday is as meaningful to you as you are to me. You are such an important part of my life, and I want you to know that I truly treasure you. Happy birthday!
173. Growing up, there were times I wished you weren't my sister, but these days I seriously don't know how I'd get through life without you by my side! Thanks for always being there for me, sis. I hope you have a brilliant birthday!
174. No matter how old we get, I’ll always look up to you. Happy birthday to my big sister.
175. You are one of my biggest inspirations. Wishing you the happiest birthday!
176. Relax and enjoy your birthday, it's your special day to shine! Who cares if you're a year older? You're also wiser, more experienced, and ready to take on whatever life throws at you! You've got this!
177. Sister bonds are one-of-a-kind. I’m so grateful to know this firsthand. Happy birthday!
178. You're a beautiful person, a loyal friend, and such a special sister. Thank you for bringing so much joy and laughter into my life. I hope you have a wonderful birthday!
179. I could ask for no greater friend than you. You comfort me, protect me, encourage me, and love me. In short: you are everything to me. Happy birthday to my bestie for life!
180. You are such a strong, smart, and sassy woman. I value your opinion now just as much as when we were kids. You are everything I aspire to be in life. Happy birthday!