Guy problems 😔

Ladies I need some advice. About a month ago I met a really nice guy, we only met at parties at first and always made out then and when we first properly met he was really cute and always texting me and everything. We had sex a couple of days later and met several times for sex afterwards, he even took me to his parents house when they were on vacation and he needed to take care of everything. Last time we met was about 1 1/2 weeks ago and since then I only heard from him when I texted him first. But I think I might be crushing on him. Also, whenever we're together it feels like we're a couple, he wants to cuddle after sex and we talk and joke around a lot. What should I do and what do you guys think might be the reason for him to avoid me? Btw, I'm 19 and he's 21, just in case you wondered