The questions asked do not have to pertain to the relationship.However, the answers to these questions may provide useful insight into his psyche and personality.
As you can see, most of the questions that you are dieing to ask him are of intimate nature.
Some relate to his past, while others relate to your relationship or his personal tastes and character.
If you assure him that you are simply trying to get to know him better and in no way would you judge him from the answers, he may feel more comfortable to share his innermost secretes with you.
There are always questions plaguing a girl's mind about her boyfriend's life, of his past and his present, as well as what his plans for the future are.
There is a good chance that even if you have tried raising some of these questions, he has not been too forthcoming in his answers.
It's universally known that men are not all that forthcoming with information; especially about themselves.
Most girls try various methods to get them to answer these questions to no avail.
However, there might come a time, when he is ready to play a game of "moment of truth" so that you can get to know him better.
Being prepared with what you may want to ask is a good idea, so that if an opportune moment arises, you can find out his answers.