I wouldn't mind some honest advice right about noww?

Yes, you did answer your own question. He may just be a flirt but I don't think he has any intention of breaking up with his current girlfriend. Maybe she's not the best looking girl but there's probably something about her keeping him with her and not playing the field. There's no point going after a guy who's fallen for a girl over something you can't even see, it's hopeless really. That's the 1st stage of love.