Does he not want me anymore

My bf and I talk all the time and hang as much as possible. (We’ve been together over a year and a half) He commutes to school and works hard. Lately though it’s been taking him longer to reply. He’s talking less it’s like he’s not even interested in hearing how my day was. We haven’t seen each other in like a week so I thought he’d miss me and wanna hang tonight. (We both worked today) I’ve gone through a lot this week and it’s been rlly hard. I failed my driving test, failed my swim test. I’ve been so stressed and crying a lot and I just want to be w him. I thought he was coming over tonight finally but then he canceled last minute. He said he had a shitty shift and was too tired to come. Which he’s done before to me. I just feel like I rlly needed him here tonight cause everything’s been so bad lately. I’m just upset now and I feel like he doesn’t want me. I understand he’s tired but we haven’t seen each other in a while and