Just because you relapse does not mean you are a failure. Relapse is a part of your recovery. You will have times you slip and break but that in no way means you are a failure. Recovery takes time, it takes try’s, it takes work, and it takes falls. If you relapse, you didn’t fail you just slipped. Take a deep breath and start over. You will get there, don’t doubt yourself.
Dust yourself off, and try again. Don’t give up.