Too early for sex?

Hello I’m 15 and I’ve been dating this guy for three weeks who I liked for two years. We’ve already both gone down on each other and I think I want to have sex with him and it doesn’t feel too soon but the culture around me makes it feel like it is. I got my period at 11 and devolved at a young age and would consider myself mature for my age. Is it too soon to have sex with him?