Am i wrong?

My “boyfriend” (i put quotes because as of today we aren’t together) had the day off today i had to work all day 11am-8pm but i ended up getting off early at 4pm i arrive home to see my boyfriend eating tacos with another girl i couldn’t believe my eyes so i went to my room to take off my shoes and calm myself down because i just wanted to go crazy on both of them (i wasn’t in my room for now more than 2 mins) mind you the girl is his MANAGER.... the second i come from out of my room the girl is gone like she was never there and my boyfriend was playing it off asking me questions like nothing ever happened should i be concerned about this or brush it off because it’s his manager?! Not to mention i didn’t tell him i was coming home early because i wanted to surprise him but it turns out he had other plans anyways... we’ve also been texting majority of the day and he mentioned NOTHING about him having lunch with her at my HOUSE