7 months ago my boyfriend was messaging a co-worker, being flirty, bought her lunch for Valentines day and the girl couldn't even look me in the eye when I went to his work. We broke up for a little while maybe a few weeks, he then promised he'd stop, which he did. Now a new girl has started working there, she has been working there for maybe a week before he got her number. He told me it was because they both were interested in a game he was getting (we are both heavy gamers). They now text everyday. I've told him I'm not okay with this because of his last female co-worker situation, but he's defending it. We are currently on another break due to this, but it hasn't stopped him from talking to her all the time. I honestly don't know if I should just give up or if I'm being an idiot. ALL advice is welcome.