Hi!
I used to have this exact problem, I still do sometimes, the voices will come and tell me I'm being overdramatic for attention. I saw a video once that really help me, it said something along the lines of "if your symptoms still show when you're alone you're not doing it for attention". Usually when this happens to me I'm alone so I'll just answer the voices "sure, look at all this attention I'm getting from all the people that are seeing this" (sarcasticly obviously). This really helps me so I thought I'd let you know, in case it helps you too.
Thats just the little trick I use to cope with it, but regardless, it isn't fake. Being depressed is no fun, as you probably know, you wouldn't go through it just for attention.
It's normal to feel that way when you have depression. I feel like since there's nothing to really measure how much emotional pain you're going through, we might sometimes feel like maybe you're not that sad or going through that much, because you really have no way of knowing how much sadness is "normal", so maybe everyone else is going through the same and they just deal differently, who knows. But honestly, that doesn't really matter. If how you feel is affecting you in a way that is giving you other symptoms like the ones of depression, than that's valid, no matter what. We don't all deal with stuff the same way and that's ok, you should never minimaze your pain.