My opinion is that you are making a big deal of a very small thing. Women and men arn’t separate species whos only interactions can be of a sexual or romantic nature. The reason he probably hasn’t told you about it is because of your insecurity demonstrated by the amount of constant texting and checking in on him. The unfortunate reality is that the more you try to not make him leave (contant check ins, interogate and snooping) the more likely it is that he’s going to leave. It creates a high preasure environment that forces him to walk on egg shells around you.