Hi Lexie,
A simple solution is to simply not reply to the text! Then, if he ever has the yen to text you again, he will notice that you had never replied to his first one! He will be unlikely to do it further after that. If he asks you about it say, “Oh yeah, I think I got them.” He will discern that you are either not interested or not a texter.
Wishing you Simplicity and Discernment,
Inky