How to cope up the fear of ghosting

I’m 26 and have been talking to a girl (24) for almost 5 months. We met on Instagram and developed a good friendship. She has shared all aspects of her life with me, and I’ve done the same. She’s a good friend, and we’ve built a strong bond. However, I still have a fear that she might ghost me, and I even confessed this to her. She reassured me that she will never ghost me and will always communicate with me before leaving the friendship, if that ever happens. Despite this, I can’t seem to get over the fear and constantly worry that she might ghost me. Even when her replies are delayed, I feel like she’s about to ghost me. Can you suggest some ways to deal with this fear?