Okay come on, if this is happening this early on there's no ways it's a will-they-won't-they, surely there will be a plot point where they figure it out but don't say anything so they just mutually agree to keep the lie and they both know it.
Poor guy got cheated on but still thinks he’s the one at fault and praising the guy that stole his girl, I mean it’s good that he doesn’t take it too hard (or atleast composed enough in public to put out a front that doesn’t seems hurt) but you need to value yourself more bro.