Now even before you give your thoughts to the above questions.
I want to clear you one thing which is very significant.
"Now ask him what can I do to improve and make things better and be bold enough to tell him that if you are not happy I am ready to walk away".
The moment you will talk of walking away, trust me this words will hit him hard and get him emotional (if he really loves you) and that's when the new story will begin slowly.
But he maybe pulling away and getting distant from you.
Now discuss with him whether he genuinely want this relationship, is there something that's pinching him, is he not happy about something within the relationship.
Whatever his answers are, you have to be very patient and concise.
It's not necessary that two people mad in love will always have common thoughts, just because they love each other.
No it's not true, if this was true you would never see broken hearts and lonely people in the world. The answer is try to find out the reasons behind him trying to pull away and getting distant from you without getting obsessed for him.