There's something about personal spaces...
There are people who know where I live, have been into every room in my home, can walk the length and breath of my apartment and there would be no issues. They can do this because I am comfortable with them in my space. I can leave my house in their care or fall asleep and they will be awake, doing what they want.
In the same way same way I have people who offer me this same "freedom". Nobody is checking on the other person to know what they are up to or where they are and that's cool. There are people's kitchen's and rooms I walk into without restrictions and monitoring and there are those whom I visit, sit on the couch silently, and cross my legs like a celibate monk at a strip party.
In life we will not all be friends and we will not all be allowed the same kind of latitude, no matter how much we may want it to be so. Learn to stay within the boundaries people place for you. You do not have to like it but it is just the way it is, and does not make them evil or stupid. They should not have to be uncomfortable to make you happy. No one owes you that at all.
Whether it is a pet name, knowing where they stay, being able to sleep over at their place, open their bag or wallet, whatever it is, understand that it is their choice. Also remember that you yourself have people you would not allow do certain things to and around you, so why be mad when others do it to you? Are you somehow lord of the allowances?
I get it that this person may even someone you like, admire and respect so much. They may even be your idol, so to speak. It does not mean they have to agree to what you want. They have the right to say no and when they do, respect it. Some people are even the kind who will eventually "let you in" but because you have already started displaying some sort of character which they might not really be comfortable with they're forced to just go their own way and let you be!
The point is we should always try to respect personal spaces of others; when you infact notice someone is trying to create a bridge between you too just let them be and if it's a person you'd really want to be comfortable with then first prove yourself worthy rather than being all up in their business; that can be a turnoff for most persons(though it all depends on the way you do it)