SO struggling with depression

My boyfriend and I (both in our early 20s) live about 3 hours apart currently, so I can only see him on the weekends pretty much. He’s really stressed financially and emotionally, and currently battling with depression. He moved about 900 miles from his family to get his life together and it’s impacting him hard. His parents/brother have come to see him in recent weeks and that helped temporarily.

Is there anything I can do as his girlfriend? It’s so hard to watch, and it’s making him occasionally act out.