It is difficult to maintain the feeling of having your desire already if you keep bouncing around the feelings of having and missing it.
Focus on the feeling of having your desire already. Love your desire and allow it to love you. Decide that it is yours and stick to your belief.
You can’t have your desire and be missing it. Make a decision! If you decide to have it, you will automatically know that any of your negative thoughts around your desire are false. You might only use them to uncover your own limiting beliefs.
If you choose not to live your desire, fair enough. As long as it was an honest change of heart.