first timer help

So i’m 21 and i decided to loose my v-card with my boyfriend and the first time wasn’t long or magical as i thought it would be which is okay with me. I recently spent a week with him and we had been having sex off and on but it never lasts because i’m not experienced and it kinda makes me a little insecure because he has experience... certain positions tend to hurt but idk if it’s a good hurt or a bad hurt because i’m not experienced. help please!