CANT SQUIRT FOR SHIT

I’m 19 years old. I CANT SQUIRT. I know some women aren’t able to but I really feel like I can! Or do I.. When my boyfriend goes intense, I’ve always felt like I had to pee. I always held it in because I thought I’d pee on him. My cousins, who are squirters!!!, told me to just let it go. I tried multiple times! I cant. It’s like a reflex that never lets me squirt! Please help, it’s so frustrating because it happens every time. I always want to let go but I can’t. Am I forever going to be like this or will I eventually be capable of LETTING IT GO? Anybody experienced this and finally squirted?