Tips for losing virginity?

Okay, I'm 18 and decided to try sex for the first time with my boyfriend. So we tried, but it didn't really go in because, to put it simply, I was too small. It hurt because I wasn't as relaxed or turned on as I could've been (I was nervous as this is a big event for me). Any tips? How many attempts did it take some of you ladies? I really appreciate it, girls.