A friend like you is a beacon of light in anyone's life. I am very lucky to have you as a friend, and so today I rejoice even more, because it’s your birthday.
Congratulations! Have lots of fun and please, never leave my side. I wish you all the happiness this world can offer. Happy birthday, my dear friend!
A 21st birthday is a very special and significant milestone in anybody’s life, but especially so when it’s the celebration of such a wonderful girl like you!
Many congratulations and a very happy birthday to you!
I hope that all of your hopes and aspirations come true for you at this momentous stage of your life.