I need help

hi

i broke a promise to someone that I love who also struggles with sh.

this summer we promised each other that we wouldn't sh ever again, and everything was going good until i relapsed a week and a half ago. i don't know what to do, because i feel like i would be lying to them if i didn't tell them that i did. but i know that if i did tell them, they would relapse too, and that's the last thing i want to have happen. i feel dishonest the longer i keep this hidden from them. (we are in a long distance, online relationship.). how should i healthily handle my guilt without making it worse- without them relapsing too?

i really would appreciate the help...

xxxx chase <3