Could we replace the "to be" + adj. laetus, a, um structure with the verb gaudere? I'll try it next time, and see!
They have almost the same meaning; Gaudere is to rejoice. So also, to be joyful.
Do you want to use gavisus?
(Gavisus seems stronger than laetus)
Gavisus sum (I was glad, I rejoiced), gavisus es (you rejoiced), gavisus est (he rejoiced) is the past tense (perfect, or preterite) of gaudeo, gaudes, gaudet.