Should I break up with him because I'm not strong enough or is it selfish?

My boyfriend is battling depression so he is unable to care for me and love me the way he used to. He is seeing a therapist but I don't know when there would be progress because I know that it takes awhile to get better. But sometimes it just really hurts to wait.
Should I break up with him because I'm not strong enough or is it selfish?
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