Step outside yourself for a second and pretend you are the person sitting next to you. What advice would that person say to you right now?
The person sitting next to me would say, "You're really good at solving problems for this company. But I can see that you're not motivated and you're frustrated with how your role is changing. Maybe you should set aside some time to solve the problems you're having with your job before you give any more time to other people's problems."