Dream interpretation is the art and technique of giving meaning to the various components, images and elements that appear in our minds while we sleep. It is an ancient practice that allows us to further explore the psyche of the human being in order to understand it.
There is no single interpretation of this aspect, the truth is that it will depend on the circumstances and the ways in which your ex appears in your dream. You may dream that you have sex with your ex-partner; this is very common and has to do with missing the physical contact that you had with a person for a while and the level of trust that they acquired.
Another of the usual dreams is that your ex-partner has a new love; This implies that you have not yet banished him from your heart and there are still things pending. You can also dream that you get back together with your ex and if, in that case, you wake up smiling, it is because you still miss him or her and maybe you can do something about it.
Undoubtedly, these types of episodes are normal after a breakup. If they repeat themselves, you may have to focus on this situation and try to heal what happened inside.