I stayed up at college one Summer and worked there as well. My parents didn’t seem too upset by it, but as the first of 3 kids, I am sure my mom was a bit sad by it as well. What I will say is that after college, I came back to work in the same state my parents were in, and as my wife and I had our first child, we moved even closer to my parents for the help.
This was all 20-24 years ago, and today, I have my own in college, and I live 10 minutes from my parents. We visit often, I eat lunch with them, and so forth. One of the reasons I love them as much as I do is because they were always understanding, and always tried to help me.
There is 100% a period in the life of a young male where they want to be away, independent, and I think that is the 17-25 range where it peaks. No promises, some sons move to the opposite coast and you barely hear from them, just the way they were built. But the most important thing parents can offer their kids, in my opinion, is support and to always have them know you can help them (emotionally, maybe financially). I think it’s important to be the parent when they are younger, and then you shift to the “friend” as they become adults.
Of all the bad parent/child relationships I know of, the parent tends to want to be the parent even when the child is an adult (the mom or dad who tries to force their views, push the kid to do certain things, judge them, scold them, etc).
His independence will likely be a strength for his life. Some of the kids that come back home to always live with mom and dad are less likely to thrive on their own. It’s a blessing and a curse.
Sorry to hear you are going through it, hope this helps