Unfortunately depression isn't currible all you can do is talk to your therapist and psychiatrist to help cope with it

Yes, it is possible that you will have depression for the rest of your life but it doesn't mean that it will be. Give yourself the love you deserve and fight for the opportunity of happiness and peace, we are all Warriors in this world you just have to build up your strength to fight and conquer the battle in your mind.

They say people with depression are warriors for a reason, depression is a battle. You have to find coping skills that will help you prepare for when you're hit with a wave of depression. Recovery is essentially you learning and practicing these skills, telling depression that it can't and won't consume your whole life anymore. Depression is not unmanageable. Many people even find inspiration in their depression and make beautiful things out of it. Don't underestimate what you're capable of, even with depression. You got this.

I've had my depression, anxiety, panic attacks for pretty much my whole life.

Many times depression is a physical thing, so yes, it's lifelong. Sometimes it's not. When it is lifelong, it's often like a spiral. The good times last longer and longer and the down times get smaller and further apart.