Should I be upset

Okay, so my boyfriend just got back from college and I haven’t seen him in 3 weeks. He came home Monday night and its now Friday night. He hasn’t tried to see me or anything and when ever we text he takes 1-3 hours to reply to me. He tells me that he is just super busy seeing his family and that. But he came home from college almost every other weekend since he was only an hour away. He claimed he missed me so much last weekend when he was still at college. And now he barely acts like I’m his girlfriend. He doesn’t try to see me, he doesn’t say he misses me, and he feels so distant. I just don’t know if I should be upset or not.