Dating someone with depression

Hello,

My boyfriend has recently come into an all- encompassing bout of depression. We are long-distance which has been very hard with a pandemic already and now he is getting more and more distant and closed off due to the depression. He’s feeling like a failure in every aspect of his life and not finding joy in anything.

I’ve asked him if he needs a break to figure this stuff out alone and he responded by telling me he doesn’t want to lose me, he loves me so much and needs me. He sent a long thread of vulnerable, loving texts. When I woke up and responded supportingly and lovingly, he was closed off and distant again.

I am living alone as a single mother during the pandemic and his sadness is making me feel pretty depressed and hopeless myself.

Does anyone have advice for dating someone with depression?? Or do men have advice for how they want their partners to react and cope when they feel unworthy and defeated.

Thank you