Depression

I feel like I don't know what to do. I've had a very on and off relationship with my boyfriend and he's so depressed. He's military and it's so sad to see how terrible the military treats their soldiers for mental health. This made him fear getting treated and he thinks he might be discharged because of it. We're long distance at the moment and I don't know how to help him. He's not interested in visiting me anymore or calling or skyping. He's not interested in sex either. I just want to be there for him and it's kind of zapping my energy too. I don't know what to do or how to get him to seek help without him potentially being punished for it.