help! need to relax go!

Hi any1 got any tips for me??

During sex n some times forplay I just cant relax meaning I dry up n clam up completely ruining my mood etc. ?

I know some of it might b to do with us never having place to ourselfs(parents home)

My body confidence

And slight tearing experience.

My boyfriends great but I don't wanna him to feel I push him away n tbh I dont want this feeling anymore..??