Tell your parents NOW. If you simply cannot, find someone who is kind to you and tell THEM and ask them to talk with your parents with you.
If your parents were of the type to ignore your request to be heard and wouldn’t listen to your call for help, then I doubt that you would be concerned about telling them. What would be the point?
One of your challenges is the private sense of shame, of needing to keep this all a secret. Telling your parent about your depression is not the same as talking to a therapist.
Your parents don’t need to know everything about what’s going on with you, all of your thoughts and fears, your assumptions about why you feel this way. These details will be shared with your therapist in a safe, neutral environment. All your parents need to know is that you’re in pain, that this is a very difficult situation, and that you want them to know what’s going on. If there’s more you need or want from them, you’ll have to ask for it. We all need help at times. It’s a part of the human condition. You didn’t bring this on yourself, it’s not a flaw in your character, it’s not because of something you did or didn’t do.
Feel free to private message me. I'm not an therapist, but I believe talking to someone who will listen what you're going through really helps
