Rant

This is going to be really short but I just kind of needed to vent about something. Okay, I have depression and have for the last four-five years, my parents have only known for about one and a half. They don't seem to understand how it affects a teenager going through the stresses of high school with undealt feelings towards things that happened five years ago that to this day still affect me.
So my brother came over today and things went better than expected. But whenever things are going well with the rest of my family I feel like shit and visa versa. So because all the problems with my brother were dealt with I'm sitting here becoming more and more closed of and quiet so when my brother finally leaves this is the conversation that follows (Mum in normal me in italics).
Was what I said okay? Did it go well? Yeah. What's wrong, you've gone all quiet? Nothing, I'm fine. No, seriously, tell me what's wrong? Does there have to be something wrong for me to be this way?
And then she sighed really loudly and walked off.
I never asked for this to happen. It just does. Don't go around blaming me, maybe you should actually try and help me and fucking try to understand what it's like to be like this.
It is the absolute worst and makes me feel guilty because everything's finally okay and I'm here feeling like absolute shit.
Ugh, rant = over.