afraid I can't have sex

I'm really afraid that I won't be able to have sex. I can only ever fit one finger inside myself. If I try to fit two, it almost feels like there's a bone that's stopping it from going in. It's not like my vagina is "too tight" to fit it in, but it's impossible to actually get two fingers to enter me. I don't know if this makes sense, but when I have a finger inside me, there's a lot of room in my vagina to move it around, so it feels like I could fit more into my vagina... But I can't get it to go in. I'm afraid that when my boyfriend has sex with me, it won't be able to go inside me. What do I do?