<human>: So brief history, they've been together for about 2.5 years, give or take. The relationship was pretty serious - in his own words, he "gave her a ring" (though not of the engagement kind). The relationship even survived a year of him going to law school in a different city.

A couple days ago, I and a few other people were notified by a mutual friend that the relationship was over and that the cheating was the reason. The mutual friend suggested that we give him a call or something to check in. I had planned to, but didn't for two reasons: 1) I've been really busy recently, and 2) I had no idea what to say.

Yesterday, I get a facebook chat message from the friend who'd been cheated on, the first time we've talked since the breakup. Still not knowing what to do, I follow his lead and we proceed to just shoot the shit as per our usual conversation. Partway in, he tells me about the cheating. I listen and provide the usual support (agreeing with whatever he said, "it's her loss, she doesn't deserve you, you doing okay?", etc) but don't take the lead in the conversation and definitely don't tell him that I already knew. Eventually, the conversation naturally segues back to shooting the shit and we continue to talk about our usual topics (sports, history).

A little bit about me: I have zero relationship experience to speak of whatsoever, and almost never talk about my friends' relationships with them. This is mainly because the lack of my own experience and I don't want to be seen as prying. As a result, I've gone through most of my life without having to deal with something like this.

Now, since my friend took the step of telling me about the cheating and confiding in me, obviously I want to do everything I can to be there for him. The question is, did I make any missteps with the conversation yesterday, and where do I go from here?

Condense the text into a few key points
<bot>: Friend got cheated on, long and serious relationship over, he talked to me about it, I want to know how I can help him out.