Then, if your friend ever comes to you thinking that their partner might be cheating, you can tell then what you know.If they ask why you didn't tell them earlier, just say you didn't think that it was your place to intrude on their private business.Being a relationship writer, I sometimes have to investigate new apps for a story, whether or not I am in a relationship.
Plus, your friend's partner will know they are busted and won't have a lot of time to save face or make up excuses.
Other people's relationships are not your business, unless your friend explicitly asks you for your advice.
Otherwise, you might just be involving yourself in a situation you don't know a lot about.
It can be scary, but if you've thought about it and think this is the best plan of action, it could be worth it.
Recently, my friend started dating a new guy whom she is really excited about, but he has been wishy-washy in terms of commitment.
Since their relationship seemed noncommittal at this stage, I didn't think that saying something was the right thing. The group consensus was to do nothing, and it turned out, the girl was just his friend, so I was glad I hadn't done anything dramatic.