How do you handle night shifts?

For context im 19 and my partner is 18. Im super proud they are a nurse tech at this age and they've worked so hard- but I have chronic anxiety, sleep issues and attachment issues. Hes only working night shifts as we go to college and the place we live doesn't allow pets so no little friends. I feel so lonely and cry after he leaves for the night. He works 12 hours and I hardly get any time with him due to his schedule. I miss him a lot and feel so lonely. I've tried blankets that smell like him and playing games and watching YouTube to distract from him. But I just get sad. Does anyone else feel this? Is there any ideas I can do to help myself out. I love him, we are engaged and I dont plan on going anywhere cause we have a strong relationship but this just hurts me.