Advice?

I’ve been talking to a guy for like two months and we basically act like we are in a relationship and now I don’t really know how I feel about him?? We had sex and I really didn’t feel much and I feel like I’ve lost the butterflies with him but I like spending time with him and we can be together all day yet it feels like only a few hours. Idk if after sex I started to question how I felt and now I’m just obsessing over it and it’s ruining how I actually might feel?? I’m so lost