My parents want to go to relatives (another city) soon and stay there.
but my parents suggested that I don't have to come with me and can stay with my cousin (my other cousin lives next door)
can I stay at home alone? My parents said you shouldn't do that, but is it really true? I mean it would only be one night and I would be alone here all the time anyway and probably would have watched netflix
Since the parents are allowed to decide where you are and probably also have the duty to supervise, they can.
At 14 you can stay at home alone. That depends on your mental maturity. However, your parents probably don't believe you can do it yet.
I was often alone at home at the age and when I was 16 I used to live alone for several months because my father went on a trip.
You can order a pizza for safety so that there's no risk that you forget the stove / oven.
It also depends on how mature you are. My parents didn't have to worry about me (but I was called anyway and had to check the door, windows, etc. In the evening just because they were worried lol)
But in the end your parents will make the decision and you will have to submit.
If you are reasonably reliable, I see no real reason why you shouldn't even be allowed to spend a night alone at home. This does not mean that your parents neglect their duty to supervise. You should be able to easily prepare something for dinner and breakfast yourself without causing a huge mess and you can also prepare something. It is good if your cousin knows that you are alone at home and you have the opportunity to call her in an emergency.
You are 14, of course you can then stay at home alone. I was often alone at home as a child, for the first time when I was around 10, for one night, of course they called me regularly and, if necessary, the neighbors knew that I could have reported there. But I was also self-employed quite early on. From 12 it was more regular, sometimes several nights. At 14 you should definitely be able to do it and your parents can. You are 14, so no longer a small child.
Just see, wrongly commented, of course, should be my own comment.