First, don't feel bad. This is a common problem. Do not drink because of this. That's not an answer and provides more problems than it solves. What about donning a condom for all sexual activity? Safe to do so anyway. But receiving oral? Wear a condom. Giving oral, keep the condom on. It will reduce overall sensation. And then while it seems counterproductive, think about other things entirely. If you sincerely have tried 'everything' on your own, it is time to get the help of a doctor. https://www.medicalnewstoday.com/articles/188527 Counseling CAN help. See someone who can talk you through this. Also, antidepressants have been prescribed that have a side effect associated with them that helps with premature ejaculation. It is between you and your doctor if you go that route but it is an option. Dapoxetine is something else that is used that you can talk to your doctor about.
You could also see a physical therapist to discuss this problem who may have ideas.