It's alright to take a break from it.

Play other FPS till you start missing TF2.

I'm uncertain if this will be of use to you, but in my mind, I believe that one should take a break from TF2 for a considerable amount of time. Such as several months, for example. In a way, I find that this amount of time can somewhat erase one's lack of interest in TF2. Besides that, however, there are other ways to rekindle one's interests in regards to playing said game as well.

To elaborate, one may try to utilize different load outs than the ones that you may often utilize when you play. In addition, you may also play on the other game modes than the ones you may often choose. I view that you'll be able to make use of them to alter your experiences with the game as well as how you play it.

Moreover, the same can be said for the classes as well. As playing each of the nine classes can give one new experiences in regards to playing the game differently. Which also gives one new ways of "experimenting" with the game as well as how you play. Of course, as stated earlier, you may simply take a short amount of time off from TF2 if you have little to no interest, or enjoyment, from playing TF2.

From your words, i can sense you won't be abel to enjoy TF2 for a while. A break can be great to relax and try out something else.

Hats