Bladder/Kidney Infections

Hey girls, I just want your opinion on something. I’ve been with my boyfriend for over 3 years now, but over the past year, I feel like we can’t have sex without me getting a bladder infection. They come so often now. I was just wondering if you girls have dealt with the same thing, and what are some things I can do to prevent it? It’s becoming way too frequent & I feel my poor body shouldn’t go through this as often as it does! Thank you!