Relapsed once again

I keep relapsing, I keep going on 6 day streak but I keep relapsing. It’s like a never ending cycle. I feel like a failure and I feel like a disappointment to myself and most importantly my Lord Jesus Christ. I pray and ask for forgiveness, but I always end back into the deep dark hole of this addiction and I feel like this prayer is not working, but eventually I know it will. Please help me and pray for me to end this cycle of pain.