Got cheated on again:((

Oh my gosh, thiis is such a mess honestly. So tonight I went intto his office because I needed paper to print something out, but then I saw an open email from him that was... questionable. It seemed like he was texting with some other lady and things got super weird after that. I kept scrolling through his emails and found another one where he mentioned giving this woman a lot of money and maybe even paying for an AirBNB last month. What the heck do I do, am I overrthinking everything or should I be worried about this?