"I might find this position more attractive in a number of ways" - Talk to your boss about this, tell him why you would like to continue working for him and see

"I might find this position more attractive in a number of ways" - Talk to your boss about this, tell him why you would like to continue working for him and see if there is something he/she can do. If it doesn't work, walk out, making sure you honour your notice period and have a face-to-face chat rather than sending an email.