Some really flippant and judgemental responses on this thread.
The point is the OP is not happy with the amount of interference from her parents. She sees their behaviour as smothering and unwanted and it is affecting her negatively.
The fact that you are related to people does not mean you get on with them or that you want them in your life all the time. So the OP is perfectly entitled to feel that she wants to be more independent and not have her parents so involved in every aspects of her life.
Reading between the lines it does not sound like there are some issues in this family.
I am an only child too and I moved away from my parents to a different country when I was fairly young after they ''care'' led me to have a breakdown when I was 19. They had no respect for boundaries and considered me to be their property/an extension on themselves, not an individual who should be able to make their own choice. They were mentally and physically abusive and I had a really miserable childhood and teenage years where I spent most of my time alone in my bedroom. I only really went out with them and was never allowed to take part in any fun or educational activities as a kid where I could meet other people/kids and start learning to become more self-confident.
When they saw that I might be able to get away from them by going to university the manipulation and control went into overdrive with my mother intercepting and destroying my university acceptances letters or doing things like pretending to faint and have hysterics simply because I wanted to choose the subject I wanted to study and where to study it. The point is some parents are simple not able to have a healthy relationship with their kids.
I have no contact with any of my relatives and I don't miss them at all because their behaviour meant we never developed a healthy bond. I don't love my parents. Never have and never will. Like you I always saw their questions and calls as unwanted because I did not trust them or their motives.
My relatives are probably thinking I am an ungrateful monster and that my parents were (to the outside world) such nice people. But none of my relatives lifted a finger when I was being abused and neglected although there were clear signs that things were not right with me.
So OP, if you feel something is just not right in the relationship you have with your parents, don't just accept the platitudes that some people are giving you like ''you will miss them when they are gone''.
Speak to someone like a counsellor who is neutral and will not go on about how you should just just be a grateful daughter and who will help you understand and make sense of what is going on and help you work out what level of contact you want with your family.