My boyfriend is very depressed he's on medication and talking to a therapist?

I need advice to get through this... He has been depressed for months and withdrawaling more each day... He doesn't talk anymore... Pretty much won't leave the room... Yes always withdrawing into his phone... I'm doing my best to help him through this... But it's taking a toll on me... Yes also has R. A. witch he's being treated for but seems to always be in pain... I'm supportive and loving and I am trying so hard to help but it isn't working... I go to his therapy appointments with him... Just trying to understand what to do... I love him so much... I just wanna be there for him... What should I do
My boyfriend is very depressed he's on medication and talking to a therapist?
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