It's been 2 weeks since..

So I'm soon turning 19, and my boyfriend turned 21 in March. We've been together over a year and had been having sex a little longer (don't judge!). Our sex life has been great. When we didn't live together we was wild, we would do it anywhere. When we moved in together things slowed down. He was always tired, or I wasn't in a good mood. It started going from twice a week to only once. I always put in on here when we have sex. And it seems like it's less and less. Well it's Friday night, and Tuesday will mark 2 weeks since we have done anything sexually. 
In a way I know if we do, it want even last long since its been forever... But I'm worried. He had no time to cheat on me... so I know it's not that. Sometimes I feel like I just don't turn him on. I've always been insecure about my body. So this sorta makes it worse. I don't know what to do. 
Tonight he was drinking and he was tired. While laying in bed he touched the top of my undies and my body had chills... Like it's been so long. But he kept dozing off so I rolled over. I just feel like something is wrong with me... Shouldn't a 21 year old male want sex? 😔