If you are burnt out, you need rest, and a change to your training plan. Riding as hard as you can every ride isn't very effective. It sounds like you have gotten much of the value from "just riding" and are getting to the stage where you need to make a plan.

But to do that you need goals. "getting better" is not a good goal. What do you want to do with cycling in the near term? Ride a (metric/full/double) century? Race? Group rides? Do your local loop in XX minutes?

Once you decide what you want to do, you can then make a training plan for that. There are plenty of books that talk about different kinds of plans and how to make one.

Of course if your goal is just to have fun, there is nothing wrong with that. But you are probably going to define "fun" in a certain way and want to do that kind of riding and get better at it, whatever it is.

A major component of any plan is getting enough rest. Without it you won't improve.