Not considering all the escalation factors,cause those are mentals. How would u do with death grip,considering that with my last gf i wasn't able to cum only from penetrative sex or even oral,most of times i had to finish it ,cause only i can give myself the right stimulus to come,do you have any suggestions?
Keep doing what you are doing - stop edging and masturbating. It may take a long time, but the desensitization will get better eventually. RULE #1: Only touch your dick if you are peeing or washing it.
Do a 90 day hard mode reboot. It will give your body and your mind time to begin healing. You have to un-learn all the bad behaviors that you've learned over time. Success will happen, but it won't be overnight and it does require you to be patient and dedicated to healing yourself. One day at a time is how we all succeed.