I can't tell my parents that i think have depression and need help

Tell one of your church leaders, or if you really don't know what to do just find any chuch and ask to speak to the minister... and tell them and ask for help getting help.

Any real minister or preacher knows who to call to get you help, if they cannot assist you directly.

Don't wait until you feel like you 'deserve' help. Your first port of call is a responsible, trusted adult. This adult will not be able to help you directly because they won't be trained, but they will probably be able to help you to get help. Unless you present a significant danger to your own immediate safety or someone else's, most of these sources will be confidential, so your parents will not be told. It's good to access help early because then there's less chance of things getting so bad that you do something that puts your immediate safety in danger.

As per formalin's comment, antidepressants plus benzos are medicines that some doctors prescribe but they aren't the only solutions, and if you can avoid going down that route it's better, because all medicines have unintended effects. They're well and good if there's nothing else, but benzos can give you dementia if taken long term, and antidepressants do change your character in subtle ways, and can take away the pain of bad circumstances to such an extent that you can lose the motivation to get out of them at all. Not to mention, it isn't nice to be chemically bound to going to regular doctor's appointments (once you're on antidepressants you have to keep on them for a number of months, so you keep having to get the doctor to assess how your body is coping with the drug and prescribe you more or less of it). That can be harder to hide from a parent, too.

Then tell your doctor. He’ll know what to do. Don’t wait until you become alcoholic or suicidal.

You should talk to friends, other members of your family or even your teachers, depression isn't something to wait

Maybe see if there is some counseling available. I don't know if you have money but if not hopefully there is some available in your area. Like others have said, religious organizations often have help. In the meantime, get a teddybear or pillow and squeeze and tell yourself you're going to be okay!

Well, you've got to tell someone! Talk to your school counselor if you're a student, which I rather suspect you are.

Antidepressants plus benzos.