My boyfriend cheated on me blackout drunk

[ande1250]

So i work a 9 to 5 but my boyfriend works in the service industry. So there are a lot of days that he gets off randomly. Yesterday he had the whole day off and he decided to go to the pool with a co-worker (also gay) and drink. Well by the time of got home they we both shit face drunk. I tried to hangout with them for a while but i got annoyed by how drunk they were and decided to go to our apartment to relax before bed. After about an hour my boyfriend and his co-worker come in and start playing loud music and parting even more. I when moved to the bedroom and put some earphones in to ride it out until they pass out or his friend leaves.
About an hour or so later I go to the bathroom to take a shower and boom they are both naked in there with hard-ons. I FREAKED! I started screaming at both of them and his co-worker ran out as fast as possible. My boyfriend was so drunk I let him sleep it off than told him to leave in the morning which he did without a fight.
I am so confused at what to do at this point.
Should I take him back even though he was so drunk he didn't really know what he was doing?