I need help, its about my boyfriend, i think he is gonna break up with me? :/?

well, we have been going out for exactly a month, its both mine and his longest relationship, so everyday, after school, we hug and kiss, or at least say good bye, then today, i didnt get to see him ALL day, because he had detention :/ so, after school i go over to his locker to say bye, and i call him, like 4 times, and he just keeps walking... is something bad going to happen or what?!?! :( :( :( please help!