Did Fall For My Ex 3 Time

So many of you may know me by my immaculate "hot dog booty" posts i made, well i have another problem. On my work shift my boss got flirty with me, he's married, has 5 kids and probably loaded af idk, but anyway. he starts getting touchy with me and to make a long story short I cheated on my bf with my boss, fuck covid i wanted some d. BUT HERE'S WHERE IT GETS FUCKED UP. I later found my boss's watch in our bed. My boss wears the same gold rolex with a scratch on the tip of it. I took it to him the next day and he admitted to screwing my bf too. Should i tell my bf I cheated on him, or do i not bc my bf was cheating on me too? 3some with my boss maybe to settle it? Idfk what do I do?