Welcome to the forums. T1 or T2?
High blood pressure is a common condition for diabetics and non diabetics. As a T1, I've had mine monitored regularly and got put on meds when I was in my twenties. Not ideal, but I'm more concerned with my bg levels and the meds hold it steady.
Are you on medication? If not, weight loss (if you're carrying extra weight) or extra exercise may help, but best to consult with your doctor about your levels. Diabetics are at higher risk of heart disease so it's best to keep blood pressure under control.
Good luck.