Should I tell my boyfriend I cheated on him?

Cianne
See my boyfriend and I have been drifting apart more than ever but it's only been like a month and a week so ig there's really no emotional attachment on either side of the relationship. And last night I was hanging out with a friend and it sorta just happened from there... should I tell him or nah? And yes u can call me a bitch but plz don't slut shame me.