New relationship advice

I've been dating a guy for a few weeks now, we're both of age and every time we hangout things get more serious (emotionally) We've only kissed up until yesterday when things just heated up, and we had sex. Since I was the second girl he's had sex with, it lasted 15 seconds tops. BUT it was so good for me. After he got scared I was going to hurt him and break his heart, because sex emotionally attached him more to me, but I know I'm not. How long should I wait to have sex with him on a regular basis? I love sex, and if it's good I don't wanna wait. 😂