Ya gotta fool yourself into thinking that you ARE happy.
I tried an experiment in my 20s (and that's nearly 60 years ago). It worked, and I've been doing it ever since.
I just kept telling myself I was happy and after a while I started to believe it. That doesn't mean that things always go the way I want them to; and it doesn't mean that sometimes there's unhappiness; but it allows me to shrug off the worst of it and live in the best.
Somebody asks me how I'm going? It's always Great! Or Never had it so good! It's always enthusiastic.
Try it for a while. Your words will carry your brain along with them, and the brain will carry the emotions.
