Ed Sheeran - Eraser Lyrics Meaning

Its about the drink, mind eraser - and how he uses tge drink (alcohol),as a coping vice.

I'm well aware of certain things that can destroy a man like me(alcahol, drugs)

But with that said give me one more(another drink), higher(asking the bartender to fill it higher)
Another one to take the sting away(drinking to numb the pain)

I am happy on my own, so here I'll stay(at the pub)

Save your lovin' arms for a rainy day(the one who hurt him)

And I'll find comfort in my pain, (mind) eraser.

Mind Eraser, No Chaser by Them Crooked Vultures is another song written about this popular drink.