My boyfriend DM girls on instagram should I break up?

Anonymous
Hello folks
So me and boyfriend has been dating for 7 months now.. recently he was sending me a screenshot of something and i saw a text from a girl in instagram of course he deleted the message but i was online already so i saw it. I didn't talk about it i didn't get angry and i didn't show him i knew. I'm frustrated no words describes how i feel so i just want to know is it like something most of guys do flirting with girls in instagram or is he cheating on me? i actually love him and i trusted him so much until now and I don't know how to tell him i know
I also found out he got 2 notification of this app "i'm putting a pic" so is it like a dating app or something or what is this? I'm so tired of this it's been a week and i really wanted to talk about it i just don't know how and i'm scared he will say i'm a drama queen and ignore me.. so help pls?
My boyfriend DM girls on instagram should I break up?
My boyfriend DM girls on instagram should I break up?
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