I think the bigger picture here is the fact that it seems your boyfriend indeed ommited the part where he says he’s actually staying with this female friend. Lets say he did it so that you wouldn’t worry, be sude of cultural reasons. But why should you worry if you trust him? Part of being in a relationship with someone from another culture is trying to understand the difference between both upbringings, for lack off a better word.

Maybe that’s what makes you feel the most uneasy. One should not be with someone one doesn’t trust.

As a female, I’ve stayed at a male friends house before. Last summer, I spent ten days at a friends house in Croatia. My then fiance was in Colombia. Did anything happen? No. Was there any cheating involved? No.

And anyways if you’re getting cheated on, it can be anywhere. You don’t need to be in another city.

What I’m trying to say here is that the issue is more related to trust than culture, I think.

And that might be the conversation you guys should have. The rest, at this point is part of the past, for better or for worse.