i started tying for 2 reasons:
1. physical therapy
2. to save $$$...contrary to what some believe, if you fish a LOT it is much cheaper to tie your own. i spent $50 on tying supplies for my upcoming florida trip and have tied well over $250 worth of flies for the trip already...and i'm about 2/3 of the way done. tying my own will save me enough to pay for a charter (during which i can use the guide's flies...lol).
notice neither reason was for fun?
i don't think you should feel a "need" to tie for tying's sake or a "need" to get rid of your stuff just because you haven't used it in awhile. would you sell your snow shovel in july? when you haven't had a flat in a few years, do you sell your spare tire, jack, and tire iron?
your post sounded by me like i "ought" to tie, or i "ought not" have this tying stuff. i hate the word "ought." who wrote these rules? where did this notion come from? 99% of the time it isn't really from our OWN wishes, desires, or chosen value system.
but if you really just want to know how to get remotivated again, try tackling a new challenge. human beings love mastering something new, learning something, etc. sometimes we don't like the PROCESS, but we all like the results. learn to tie something you consider "too difficult" or take an honest run at something you've always admired, like classic salmon flies. don't get in a hurry or make "work" out of it, though. try studying up on the genre or pattern or whatever (books, videos, internet, etc.) for awhile. eventually, you'll catch yourself thinking, "you know, i think i just might be able to..." and that's when it is time to sit down at the vise or head to the fly shop for the recipe items. after all, this **** is supposed to be fun.
and...by the way...i got hooked very quickly on the whole catching fish on flies i tied myself thing. it did add enjoyment to my fishing. and it gave me something to do when i couldn't fish. so...in that sense...it was fun right away. but i didn't really start enjoying fly tying as a separate art/hobby for several years. and i still don't tie anything that i don't plan to fish. but when you find yourself sitting in front of a vise all day to tie a dozen or less of some really complex and difficult fly pattern and coming away feeling like you had a good day because the flies turned out better than you expected, you're now doing it "for fun"...and not just to cut the cost of your fishing addiction.