Our fears about love are very broad. Especially in the first couple break up. At first, it's a "fairy tale" expectation; generally, the stories we've been told about Prince Charming and all that. Although I don't think it's completely false. But the story of Prince Charming plays with the symbology referring to other things instead of earthly love, although it also points to it.
Fears about future new breakups, of failed attempts to find a friendship that is a possible partner, block us terribly during our lives. It is a different process for each of us and for them. It's terrible. I have personally traveled "a true path through the desert" to understand what true love is; that starts with oneself. They teach us nothing of all this. We have to learn it along the way. Discovering loneliness, going through it, learning to love you. It is a long or short path but profoundly transformative. Without this transit in solitude, in the search for our inner being, we will not be able to overcome our fears in love and other aspects of our lives. It is a pity that it takes us so long to overcome the fears of losing love. Once defeated, the Universe conspires so that it reaches us. It's kind of my way.