How do I make him miss me

me and this boy been talking since November and he’s been there through all my boy problems I’ve been going through and recently I sexted him because he asked and we haven’t really talked that much, he blames it on finals but I see him on his snapchat out . We can’t see each other because we’re kinda far away, but we communicate everyday and I just want him back. he used to want to text me every day, stay up late on FaceTime, but it seems like he doesn’t want me anymore. How do I want him want me again :(