I'm a big believer in the notion that until you have a conversation about exclusivity and both parties express that exclusivity is what they want, it safe to assume that you are both dating other people. In other words, until you are my boyfriend I will continue to date around.
For me this doesn't include sex (I can't see myself having sex outside of an exclusive relationship), but I don't hold the guy to this. He's not my boyfriend he can do whatever he wants and vice versa.
What's your opinion on casual dating?
~L