happy: Happy birthday PaiPai!
10th:This is the 10th birthday of PaiPai.
anniversary:All the Paiers are celebrating the anniversary.
may:May all the friends be happy.
our:I will never forget our friendship.
love:I love my sweet heart.
and:There are many good memories of you and me.
companionship:Thank you for your companionship.
last:I hope this is not the last anniversary.
forever:Let's stay with each other forever.