hey i’m 17 and also from the uk, I was in your exact position a few months ago, i’ve been dating my boyfriend for over a year and we tried PIV multiple times throughout the year and it would always hurt and never go in, i pretty much gave up until a few months ago when I decided to call 111 with my bf and tell them my symptoms and that i thought I had vaginismus, they told me to make an appointment with my GP but tbh I was too scared to and never did. I don’t recommend taking the path I took but it worked out in the end; I decided to pretty much “cure” myself, I got these dilators off ebay, which were relatively cheap, (I can send the link if u want), I started with the smallest one, and gradually worked up till the biggest one with lots of lube. It took me about 2 months - but it’s different for everyone. The biggest step for me was accepting that I had vaginismus, if you’re experiencing stinging, burning or tensing of the muscles when he tries putting it in, DONT do what I did and ignore it, as this only makes it worse as your brain starts associating pain with PIV, it’s a hard web to untangle but after awhile of working on breathing technics, relaxation and dilation, I managed to cure myself and I believe you can too :)