Self-reflection: try to understand your feelings first. Why do you have a good impression on the fitness instructor? Is it because of his professional knowledge and charisma, or is there a special interaction between you? Knowing what your feelings for him are based on will help you deal with this problem better.
Maintain professionalism: try to maintain professionalism and objectivity during the fitness process. Don't let your personal feelings affect your fitness plan. At the same time, avoid relying too much on or paying too much attention to him on non-professional issues.
Stop fantasizing: realize that your affection for him may only be a temporary emotion, which may not necessarily reflect the actual situation. Try to divert your attention, don't care too much about him, lest your feelings deepen further.
Keep your distance: if possible, reduce contact with fitness instructors. This may include reducing the frequency of fitness, choosing other courses or coaches, or staying calm and objective when in contact.
Be honest with your partner: If you think this problem has affected your marriage, you should be honest with your partner. Express your feelings frankly and seek his support and understanding. * * * Facing problems together may help you deal with this emotion better.
Seek external help: If you find that you can't handle this problem, you may need to seek the help of a professional psychological counselor. They can provide professional advice and support to help you deal with this emotion better.
In a word, it takes time and patience to deal with this situation. Try to stay calm and objective and follow the above suggestions, which will help you get through this stage and keep your life in balance.