My parents ignore everything I say but I want to tell them I have depression, what do I do?

Be honest with your parents really try and sit down and get them to listen to you, I bet they will care more than you think!

Two suggestions. One, do the awkward thing and make the conversation formal. As in, "let's meet in the living room at 2:00 on Sunday to talk about something". This will prevent your parents from using excuses like "not right now", or "we'll talk about it later". Two, take the issue to another trusted adult, and then have them present for the conversation. This way, the other adult can interject if it seems like your parents are brushing you off, and you aren't outnumbered two to one in the conversation. I hope that this works out for you, and I'm sorry you're in this situation.