Dear ________________,
Thank you for coming to my graduation party and joining in the fun! I know you were invited to so many grad parties last weekend. I felt honored you were able to attend mine. It was so great that you finally had a chance to meet my parents and family. They were so happy to meet you too. I’ll need to text you the video I took of you dancing with my Grandma. Those dance moves were really memorable! I look forward to attending your grad party next weekend.
Thanks again,
(YOUR NAME HERE)