sex w/ older guy

I'm 16 and I just had sex with an 19 year old who is really sweet to me & just the way he acts towards me is amazing but when we had sex he's so experienced and I'm not and it hurt really bad. Like he was pounding really hard. When I wanted to stop he stopped immediately & just held me ( which confronted me a lot) and now I'm just confused on what to do now. I want to be able to take the sex because I like the lowkey lifestyle I live with him. I'm not looking for a relationship. Any advice? Lol all this just happened & I just need a female opinion