Hi Mary and Welcome to Healingwell.
I am glad that you have found us here and I hope that you find all the support you need. There are loads of people on HW that have partners/spouses with depression so there should be a mine of experience. Unfortunately, in terms of experience, I cannot help you but I am curious as to how long your b/f has had depression and how old he is. Is he not receiving treatment by choice? If his depression is affecting his life then he should be talking to someone about it so that it doesnt escalate. Sometimes AD's can help give people a boost which helps them get the most out of talking therapy.
Please keep talking to us and we will support you in any way we can