Need some advice...its a long read

So hi there, I am 18 actually just turned 18 on the 6th of May. My very living boyfriend is 21. I've known him since I turned 17. Literally 8 days after. Ever since we met he's been extremely interested. We met while we were both going to Pine Knot Job Corp. We originally had started dating Febuary 2018, yup on Valentine's day. But we broke up for multiple reasons mostly because I wasn't sure I was ready for the commitment. But we stayed extremely close after. Well I graduated from Job Corp as a certified chief and got my high school diploma at 17. Since I've left me and him got closer which I didn't think was possible but we did! And as of last Friday May 11 we started dating again. He comes to my house every weekend. Well Friday we had sex for the first time. And it was my first time ever having sex. He made me feel safe and comfortable about the whole thing. The only problem I have is it hurt extremely bad. It was so dry and painful. He told me he was sorry and was going to buy extra lubricated condoms for this weekend but I'm still really sore down there. Any advice what I should do?