Let's solve two problems today. Why does it seem like you're the only one who is uncomfortable after a breakup? How do you make your ex more uncomfortable than you? The greatest pain that a breakup brings to people is a sense of loss and great unwillingness. This will make you have an obsession with your ex, and even if you know that he is not worthy of your redemption, you will not give up easily. You know why? 
There are three knowledge points involved here.
The first one is security
In all relationships, security must be the first need, a good intimate relationship can nourish both parties, through communication, understanding, to give each other a sense of security, so that love can flow. But unfortunately, the relationship of a considerable number of people will not be so smooth sailing. Some unqualified partners get a sense of security by avoiding, refusing to communicate, resisting giving, having a strong desire to control, etc., and these people want to be strong in their relationship more than having a healthy relationship. So that he can gain a sense of security.
The second is a sense of value
Good intimacy will not hurt you, will not ignore you, and will not deny you or belittle you.
Some exes are like this, when you beg him to be together, he will constantly reject you, cold and violent you, and finally want to get out of this relationship and come out completely, he will tease you from time to time. That relationship will always be unfinished in your heart, because it is not understood and affirmed, you will desperately want to seek a positive answer from the other party, even if you are hurt by the other party, you will also look forward to finding you through the other party to gain a sense of self-worth. 
The third is the sense of loss
If your efforts are far greater than the gains, you will have a sense of losing money, not only in terms of material aspects, but also in terms of your time, money, energy, and emotional costs. Especially those compromises and concessions you make for the sake of the other person. The most terrible thing is that when you do something that breaks your own principles for him, in order to convince yourself, there will be a psychological implication that you love him very much and you can't do without him, which is reverse rationalization. Although it is a normal psychological defense mechanism, it is also one of the core reasons why you are deeply involved in this relationship and cannot get out. We've found the reason, how to fight back against this kind of difficult ex, go back and let him chase you again?
Then we need to know what he is afraid of.
The person who occupies the dominant position in the relationship, he is not afraid of quarrels, nor is he afraid of entanglement, because when he stands in a high position and watches you do these small actions, he will only feel that you can't let go. All this was within his expectations, but what he feared most was his own loss of control. Even if your emotions fluctuate for you, it proves that his framework has been broken by you. So at this time, your best choice is not to have an emotional connection with him, and not to feed his narcissistic emotions. There is a detailed operation here, that is, you can provoke the other person's mood swings, but don't be carried away by the other person's emotions, and use the illusion of obedience to him to guide his emotions and manipulate them for you. 
The second thing you have to do is get the energy back.
Whether you are in a relationship or break up, you have to use this experience to make yourself better, because there is a dark area in people's hearts. Especially for an ex, he won't want you to be better off than he is after a breakup. Your excellence and growth is a frustration of being denied to him. When he sees that you are getting better and better, he will first have a trace of loss, if you do the details in place. He will then have a very strong sense of loss, because in his opinion, he does not enjoy the added value of your excellence. He didn't take advantage of you, he suffered from you. So sometimes we say: what is the most brutal revenge on an ex? It's your ignorance and freedom. After leaving you, I didn't fall as you expected, I still shine. Even I won't hate you, because you're just a passerby of mine. This mentality is the most fatal blow to the ex, and he will have strong regrets and the urge to come to you again.