Why can't I get over her or him?

It shows that your feeling is true and heartfelt. Getting over someone who was the significant part of our life is painstakingly hard but it’s possible. However, it takes time and the phase differs depending on the person and situation. It is like pulling a nail from the wall. It might no longer be there but the residue/evidence is there. The most important thing is to tell yourself that you matter. Having support from a person or people that you trust can help you to ease the process. Getting over someone does not meaning hating that person. You just need to prioritize your well being more than harboring past hopes on your ex. Hang in there.

If you have just broken up with someone, it is very normal to feel that it is difficult to get over them. This happens to almost everyone. In fact, you might experience this feeling even if you just have a crush on someone instead of a relationship. Something that could help you understand the situation and your own self better is to try to write down your thoughts as they come. Can you notice when they occur, that is, which events and situations make you think and feel in a certain way? You can actually keep a diary in which you will express your concerns and read what you have written after some time. If you do that and let time pass, you will realize what made you feel so connected to that other person.