['My birthday was last week and I thought  everyone forgot about me.', 'Oh what happened instead? Did your friends throw you a party?', 'Yep! When I got home they were all there and had planned it all behind my back. It was great!']
Wow! What a great surprise! You should thank the person that planned it!
My birthday was last week and I thought everyone forgot about me. When I got home, all my friends and family were waiting. They had planned a party behind my back.