Graphic question about sex!

Lexi
Okay ladies sorry for the graphic content but I really need help. So my boyfriend and I haven't really had sex before but we tried, and both times it really hurt me to even barley get it in. He's definitely not small and I don't know if that's why or it has something to do with me and I really need help because I feel like I'm letting him down even though he insists that nothing is wrong with me! Please help :(