It is also worth considering if there are things in your life that actually could be better that you could change.
A large part of anxiety is about feeling you have no control over what is happening, life is unstable and terrible things could happen.
Well part of the solution is to be more accepting of uncertainty, but another part of it is to live a life over which you have more control.
For example, do you have relationships with any friends or family members where you have poor boundaries and they control you? Can you stand up to them? Or can you end those relationships? Can you take back some control?
Are you in a job where you are micromanaged, have little autonomy and are criticised constantly? Can you change job? Can you get a job where you have more control?
But without someone talking to you, without really listening to what is happening in your life, we can’t know whether the anxiety is about you needing to cope with uncertainty better, or whether it is because you are living a life where you are not accomplishing self efficacy and autonomy, or whether you are struggling with extreme trauma, or some combination of the three.
As for the notion that you can’t be happy all the time, that largely depends on what we mean by happiness. I would say it involves things like flow, contentment, poignancy, meaningfulness, duty. I don’t think it means being in a constant state of euphoria.