He messaged someone saying he would fuck????!!

Hey everyone I just wanted to vent and get this off my chest since I don’t really like posting my business on my actual social media profiles.. but anyway recently I caught my bf texting one of his “friends” talking about some girl saying he would fuck. And I got fucking furious because we’ve been together for almost 4 years now and for him to just blatantly say that about a girl gets me so mad because that means he’s willing to throw everything away and it just shows me he honestly is not committed to me, or atleast that’s what it feels like. So if you have any advice if you’ve been through something like this or maybe I’m being a little to mad ? Idk