I am not following the game plan from the Cancer Man...illusive and controlling.

I just recently started seeing a Cancer male and I have no idea what he's about. I'm a Leo. He seems to be moving too fast like using the word us and telling me don't make plans for the next weekend and this is our third date...then I noticed almost like a temper tantrum when I got involved in a conversation at a bar with someone..he just got up and moved. I'm not used to anyone not knowing I'm a like too sociable with everyone.Maybe this is an indication of future problems? Any male Cancers out there want to answer?