sorry to hear about that

If they have internet maybe you could send an e-mail and maybe then can send one back to you when they're awake. That way you will feel like you're hearing from them even if they're not around all the time.

My cousin is really close to me, we spent our childhood together, but I had to move away, but we send each other a text message everyday, it feels like we're connected.

Do you have pets ? or if it's alright with you, maybe you could go places, who knows, you may find new friends, although that's really hard.