Scared&Worried.

So my boyfriend and I had been together for almost a year and a half when we broke up for a little while. We both dated other people. We recently got back together on the 18th. He's 17 and I'm 16. Anyways, he tried to overdose and ended up in the hospital. He was the put into a mental place for 5 days where we wouldn't communicate or see each other. Only now, he was moved into a place that will help him with his suicidal and drinking problem 4 hours away. Still can't see him or communicate. He's there for 26 more days and I'm just scared it's going to change him and he won't want to be with me anymore after he gets out. Does anyone have any advice or have been through this themselves?? Also need suggestions on how to occupy myself so I don't keep thinking these thoughts. :( Thanks.