Painful intercourse

Elexis
I had sex for the first time back in March, which I was very anxious for and rightfully so when it turned out to be extremely painful. To the point I really didn't let my boyfriend keep it in. I figured it was just nerves, and considering it was my first time. We've tried several times after over these months, including different positions with no luck. Even now, it's very uncomfortable and mostly painful. I'm not sure if I'm just still not used to it, or if there's something else that could be wrong...