Ladies i need help!!! Like Now!

okay so me and my boyfriend have been together for almost 2 years now and we have not had sex. He wants to but i am terrified because his penis is like really long... like 10in and im scared he's gunna rip me in half, but i dont know if i should tell him thats why we arent having sex (i told him i had a yeast infection, period, uti, and im running out of options)... any tips? sex tips or advice or just an insight on how it would feel?