Boyfriend is gone

So my boyfriend left for basic training like 3 days ago and I’m literally going crazy because of how much I miss him!?? Anyone got any way of helping me out from being so sad all the time? Or some idea of helping me stay positive because rn without him I’m truly lost and so so sad.

He was pretty much the only person I talked to and now that he’s gone and can’t talk every day all day it’s just not something I wanted to do🥺 anyways let me know some ideas or ways of staying positive