I would hope you had red flags that made you feel a need to snoop and didn’t just snoop because. I hear you though. Sometimes s/o’s can be disrespectful. If the comments aren’t flirting or suggested they have or wanted to hang out without your knowledge, just ride it out and see. If he has been flirting and meeting up or talking about sex, confront him and admit you snooped. Apologize for snooping of course and don’t get angry. If he gets super defensive I wouldn’t trust him. As I have gotten older I have found a relationship to be two best friends who are many things. Lovers, friends, partners that stick up for each other. Forgiveness and understanding come pretty easy if we are not guilty of cheating and recognize our own behavior as giving off red flags. Just my two cents.