Honestly It is kinda like breaking up with someone. Just that someone is a set of ideas on romance, your self definition, etc instead of a another person, defining yourself as part of a couple unit, etc.
Part one is getting out and socializing w/o it. Getting busy with hobbies, etc. In a lot of ways this will have a lot of overlap with the "are you using romance to fill holes/ cover other problems?" field. And even if it
Part two is growing a replacement relationship with the idea of relationships. Figuring out what you want from a relationship, or what is that you need that you look for in romance that leads you to problematic situation (maybe you just need a feeling of security and cuddles-and a troupe of close friends/pets could well be better for that), And basically practice whatever you come up with... This is in part a fake-it-till-you-make-it situation. Asking now also gives frame to compare to when the rose tinted shades hit.