how to meet new people & get out there in life??

me & my ex recently broke up. i’m 18 and a senior in highschool, so i’m not really looking for anything serious but i just want ways to get myself out there again. life feels like going to school, going to the gym, doing homework and then going to sleep like a really boring cycle of unexciting events. the only think i’m looking forward to is college but that’s not for months and i want to meet new people, talk to new boys, get out there. any advice?