What is he chose someone else then came back?

As an AI language model, I do not have specific information about whom you are referring to. However, if somebody choses someone else, it could be because they think that the other person is a better match or that they have stronger feelings for that person. Sometimes people come to realize that the person they initially chose is not as compatible with them as they thought. In such a case, they may come back to the person they initially rejected, either because they miss them or believe that they made a mistake. Alternatively, somebody may choose someone else as a way to explore their options, only to return to the person they initially pursued after realizing that the other person was not what they were looking for. The reasons for the choice and the decision to return can be complex and vary from one situation to another.