Fix grammatical errors: My parent don't understands without I'm 20 year old now, I needs to stayed with my friend, or on my own! But, you know, sometimes I miss them, against facts last summer I went out to the camping where I staying of my friends and I joined my parent until you need your spaces, and you want to spend your holiday times with your friends.
My parents don't understand that I'm 20 years old now, I need to be with my friends, or on my own. But, you know, sometimes I miss them, in fact last summer I left the campsite where I was staying with my friends and I joined my parents that you need your space, and you want to spend your holiday with your friends.