I can't forget that a person can't be completely sure if it's fate or not, because it involves personal emotions and experiences.
First of all, not being able to forget a person does not necessarily mean that fate is not over. You can't forget someone maybe it's just because that person has left a deep impression on your life or that you've had a special experience with each other. However, this does not mean that there is a future or fate between you.
Secondly, emotions and fate are complex, and they are influenced by many factors, including an individual's personality, experience, environment, and so on. Therefore, even if you can't forget someone, it's not necessarily because fate is not over. It may just be because you have too many emotions and memories for this person, and these emotions and memories are hard to disappear all at once.
Finally, if you really want to know if it's fate, the best way to do this is to have an honest conversation with the other person. By communicating with the other person, you can get to know the other person's feelings for you and the future between you. This may help you better understand your relationship and decide what to do next.
In conclusion, not being able to forget a person can be due to a variety of reasons, including emotions, experiences, and circumstances, among others. Whatever the reason, it's important to respect your feelings and try to make informed decisions.