Help

Ive been really worried about my best friend. he has been going through a lot and it started to get worse again. I feel really helpless because I dont know what to do to make it all go away for him. I always check in on him, tell me that he can talk to me and listen to him. but I feel like I need to do more to help him. because I hate that he is going through a lot and I cant go to his house to comfort him ( since COVID is bad rn). he recently a couple months ago lost someone who he cared about so much and he said his depression is coming back. I hate so much how he has to go through this again. I just wish there was something I can say or do to take it all away for him.