Some will say this post is better suited to r/relationships, but I'm not interested in their opinion. I want Seddit's opinion.

See, throughout life I have more or less instinctively known the most alpha course of action to take in any given human interaction. But I'll admit the situation I'm in now has me stumped. So I turn to Seddit.

Basically, my girlfriend of three years was fucking another guy and I had no idea. Like, no idea. Draw any conclusion you like. I don't care.

The information I want from Seddit is this: When I next see this guy (whether it's at a bar, or in the street, wherever), what is the most alpha thing to do? Exclude physical violence.

Tell me, how would an alpha confront that situation?