Welcome to the site Frangipani!
I am only a month out of being sleeved but am so happy i did it.
I had a BMI a bit worse than yours when i saw the surgeon for the first time it was 37. But when they weighed me with boots on it was 40.
Like you and probs everyone on this site i have battled with my weight forever, but because i wasn't as big as some was worried that i would be rejected, luckily my GP was more concerned with my waist measurement being over 100cm than the BMI figure and the surgeon was happy to do the op before i developed serious medical issues.
So my advice would be do your research on this site, have a list of questions you need to ask your surgeon and if you decide this is the way you need to go stick to your guns and insist or continue until you find a surgeon to do it.