Larian Studios Forums Divinity - Original Sin Divinity - Original Sin - General Questions about the game before I buy it

I noticed the game has dialogue options. From videos I've seen of the game, you need to make choices for both characters. That kind of ruins the immersion of the game for me considering I'll only want to play this alone.

Is there an option to let the other character, lets say, the female character make her own choices?

How much of the game is available to play in Beta (out of 100)? If you can tell me how much hours you have gotten out of it, that would be nice.

Last question: when the game is out of beta, will I lose my game progress and have to restart?