no friends :/

so i just graduated high school, and throughout school i had one really close friend and a couple less serious friendships. but once we had graduated my one friend quit talking to me. my best friend is my boyfriend and i see him all the time so usually it feels like enough but he also has a big group of friends and they hang out often. and when he is hanging out with them i frequently feel really lonely and jealous of his friendships because i don’t seem to have any, and i’m not sure what to do.