Hey,
You seem to be too nervous.. try and relax. Give it time. You might feel sorry about it if you move out. Allow yourself to fall in love, if you fall out of it you will know it too. Don't worry about commitment. It will come with time. Don't get angry with him if he tells you one thing now and does the opposite later on-because he too is going through the same thing!
If he introduces you to his family, welcome it, allow yourself to meet them as you would any of your relations.. don't try to calculate or form any for of opinion. To avoid getting tense and nervous, you might think of taking some music, art .
Have a good time, wish you all the best
Take care