Ohh, he's never been around a girl before. His hormones probably went into overdrive and he didn't know how to handle it. Just give him and her some time to settle down and everything should work out.
Good luck!
I take it he wasn't this aggressive with his last girlfriend?
I'd put the hen in a wire cage and place the cage in the area where you keep the rooster. Let them hang like that for a time, this will let them familiarize themselves with each other. Make sure she's got food and water as well as...