advice...

Ok so I'm not the type to snoop around my boyfriends stuff but we live together and sometimes I just feel like I have the right to know what's going on. I see messages like this a lot and I don't know if I should confront him about it. I don't have any issues with him watching porn and things when I'm not around but things like this just seem so personal. Like he's contacting girls on the internet and it bothers me. I just wanted advice because I don't know if I should question him. I know young Guys need some freedom but to me this seems too far. (The second one was on Skype so they have video chatted before). Any advice would be appreciated