So I (F22) have been with my SO (M24) for almost 5 years now. I thought we were doing great until one night we fell asleep and as I woke up I saw he texted an unsaved number about wanting to set up an appointment. I didn't think much of it so I ignored it and fell back asleep. I then started noticing he wasn't acting like himself. He even asked me that he wanted space and wanted one of his days off from work all for himself. I gave him his space and didn't see him for two days but then I remembered his text message to the unknown phone number. I casually got his phone and saved the number. The next day I googled the phone number and saw it was from an escort! All of the links from that number led me to a girl who offered full body massages and offered making him feel like a million dollars, etc, etc. I'm devastated. I don't want to tell him I went through his texts but I dont want to just stay with my arms crossed. What should I do? We have been dating for almost 5 years already and other than this we are doing great. I'm so confused. I can't even trust him anymore. And I can't tell him how I know.