Am I Right to be Upset?

My boyfriend was going to drive over to my house tonight and sleep over. He spent all day hanging out with his two friends, which was fine. I was super excited to see him, it's been a week since I last have. (Yes realistically that's not super long, but it's long enough). Anyway, an hour ago he told me he's probably just going to come over tomorrow because he wants to stay with his friends tonight. Last time he spent the night with them, he got extremely drunk and called me, begging me to pick him up (personal reasons). Btw, he lives an hour away so I drove all that way for him, and drove him back to my house while he was wasted. So I do think hes most likely going to go and get drunk again. And it just hurts like crazy that he promised me I'd see him tonight, and then he completely bailed. And because hes most likely going to get drunk, he'll be up all night and sleep all day tomorrow. It just makes me feel super upset and like I'm not important at all. Am I overthinking this? Am I being too sensitive? I dont know...