It sound like he has gotten to comfy. Time to change things up and take charge of the moment. First let him know how you feel and then act.

Like no sticken.
A little force BDSM if you into it.
Then Saying Bye Bye. I know 3 Years is a long time. But a life time of fustration is a lot longer. Maybe if his missing the yum yum then he'll wise up. Giving you what you need "A good tongue licking.
Good Luck.