Okay so one of my best friends has been in a relationship with her boyfriend for about 5 years now. She has been oversea for nearly 2 years. Anyways a friend of mine told me she saw my BFF’s boyfriend walking with another girl. He stopped and introduced the girl as his new girlfriend. My friend was really shocked as she knew he was still in a long distance relationship with my best friend. Not sure why she told me this, now I feel bad because my best friend is back and her boyfriend is treating her really well and it’s making it hard to believe he would cheat on her. They want to get get married soon. I feel like telling her but I don’t have enough evidence and she is pretty much in love, I also feel really bad If I don’t tell her and it ends up being true and they are already married and she gets hurt in the long run. I was also thinking of confronting her boyfriend but that’s probably not a good idea.

Anyways what do you think would be the best solution for this situation?