Ignoring your feelings sounds risky and likely ineffective. Hyperfixation, however, is something we can learn to manage.
Understanding your feelings and getting them out of your thoughts can help with hyperfixation. Maybe writing them out or expressing your feelings through drawing, art, talking with a friend, or singing would help you to release them. Pent-up feelings that we can’t understand or figure out actually increase our hyper fixation, because of course, we want to find the answer.
After that, I would say distraction and action. Stay busy with other things that interest you and focus on the exact moment you are in. Try to think of exactly what’s going on around you in a room, like the lighting, the sounds, the activity at hand, where your focus is. Some people call this mindfulness, or staying in the moment, but whatever you want to call it, it’s keeping your mind in the present moment and not worrying too much about the past, the future, or the unknowns.
Lastly, I would say exercise. Moving your body and wearing yourself out physically can help keep your mind from hyper fixating too much on one thing.