Firstly, let me calm you by saying, this is very normal. To get to a point, or a few points, in your on-air career where your doubts about the future are reigning supreme, this happens to every broadcaster. But those points need to be positive and constructive. This is called a broadcasting career, for the same reason you would call working in any other profession a career too, it’s got to last.
Very few on-air presenters have a growing and illustrious career by being on air exclusively. You have to think of the long run. Somewhere you can retire happily, having contributed both to your passion, but to the industry too. Look at exploring different avenues of broadcasting that interest you, and also fill a contribution to what is happening in the industry throughout your career. Land up in a senior role or in management. Teach. Educate people about where the craft is, and where it’s heading too. Lead teams in new media where broadcasting plays its important role in prospering the growth of communication as eras to continue to dynamically change.
Most of all, have a plan. Even if you change it along the way. Just always have it.