Since I have a typically depressive personality, not really caring about myself being happy, I cannot really care about others being happy as well and thus terminal values are not found.

Well. Thinking about it I realize that for your kind of personality a falling back to carng and following goals indeed doesn't seem necessary. On the other hand the arbitrariness of nihilism isn't that different from the passivity from depression - so in a way maybe you already did lock back into the same pattern anyway?