Hi Zelda,
IRL means 'in real life', by the way.
I'm sorry you are having such a rough time. Many of us, myself included, had some very difficult years when we felt all alone with our problems.
My family was very religious and very conservative, and they were taught that being trans was about the worst thing a person could be, so I was afraid to tell them and didn't until years later when I actually began to live in my true gender. They are very accepting now, and are sorry than when I was young that I didn't feel like it would be safe to tell them about my feelings and was afraid they would reject me and kick me out if I had told them. People do change, and families often do come around, but it can take time. Sometimes it isn't until you are out of the home and on your own that parents stop having that idea that it is their duty to 'keep you safe from sin'. If you are seeing a therapist and going to school or holding down a job, it helps them realize that you are grown and capable of making major decisions on your own. It is much easier for many parents to hear from an expert that their child has a treatable medical condition (like gender identity disorder or gender dysphoria), than to hear from their child that their child wants to do something the parents have been taught is a sin.
Right now parents' job is to love you, guide you, and help you grow up safe and healthy and able to live a happy life on your own. You can help them do their job by starting to be more open about your depression and unhappiness. Even if you aren't ready to tell them the reasons why you think you feel this way (and believe me, I know many kids who aren't transgender who have no idea why they are depressed, sometimes it just comes with the territory of being young and alive, so you don't have to come out to get help) you need to let them see how much you are hurting inside, so that they can get you the help you need.
Like in my family, when one member had suicidal thoughts and self-destructive stuff, she ended up getting help through a psychiatrist that the pastor referred us to, but if she had kept it all bottled up inside, she would have died. Cutting and suicidal thoughts are symptoms of a medical problem, depression. You need to get that problem treated so that you have the strength inside to deal with all of your other stuff.
No matter how judgmental your family may seem to you now, they would be devastated, and the whole world would suffer a terrible loss, if you were to be lost because of suicide. I have friends who lost a sister or brother and they never got over the pain of it. We all need you Zelda. You have talents and a personality that is unique and valuable, and you have no idea right now what a wonderful difference you are going to make in many people's lives when you are older, or how important you are to them now.
Hugs,
MadelineB