My friend has depression.

He's been in and out of therapy for the last 6 months. He was on medication but I don't think he takes it now, I'm not sure.

He saying I'm not there for him the way he needs me to be yet he doesn't tell me what he needs from me.

We used to see eachother all the time but now it's once every few weeks and then he says he feels really down after seeing me and retracts back into his shell and I have to tread on eggshells when he gets like this and sometimes he won't speak to me for a few days. When he's on a downer he can get very argumentative and takes a lot out on me when I don't mean to make him feel that way and I'm really trying so hard.

He doesn't answer his phone to me much and seems to prefer to sent text messages which is fine.

He tell me he's ashamed of his depression and finds it hard to communicate and to talk to me about it and it all seems to come out in anger.

At worst he tells me he doesn't want me as a friend anymore and needs to do this by himself.

If we haven't text all day he'll send me a sad face or ask why I'm ignoring him.

How can I be a better friend?