Now, I don't know who this girl is, but does it sounds like I have anything to worry about? Should I ask him about this?
Most Helpful Girl
He's hiding her.
He's only messaging her late at night.
He's sending a flirtatious character at the end of each message.
You think he's trustworthy.
I'd definitely be asking about this other girl. If she's just a friend, then he'll explain with no problem, surely. Be sure to ask what the kissy faces mean to him too. Seems flirtatious to you. Seems flirtatious to me. Is it somehow not flirtatious to him?