I went to boarding school when I lived in another country - where I lived it wasn't as it is here - boarding was for state schools as well because of lack of secondary schools locally in many areas. (ie, it wasn't only for those who could afford it...)
I did enjoy boarding school because I had a very unhappy home life, so for me it was a bit of an escape. However, I still found it very hard at times, going through puberty without your mother on hand was a key thing, feeling homesick for comfort when needed. Having to be strong and independent long before I was ready, and then having a very distant relationship with my dad and siblings, who I had been close to before - the relationships became distant over time, as from the age of 11 I had to work things out myself and could only rely on myself. This definitely had more cons than pros.
For those reasons, I could never send my kids to boarding school. I have 3 teenagers, and I enjoy every day with them (even when they are being pickles!!) - knowing how they are at the end of each day, their highs and lows, their friends, what's troubling them... Just the ability to touch base with them. Pastoral support. They are young for so short a time, next year my oldest goes to uni, and I know it is a cliche, but the past 17/18 years have flown by. I can look back without regret, and without feeling that I missed out on weeks of his life, had he been in boarding school.
I am not judging anyone who makes a different decision, but if your gut feeling says no, then listen to it....