Why do I send messages to my ex-boyfriend when I am unhappy?

That's because you have a mental disorder in your heart. It seems that your money boyfriend owes you something. If you can adjust your state, you won't be in that state. You know, after your ex-boyfriend broke up with you, it has nothing to do with you. If you don't want to forget him from your heart, then I suggest you adjust your mentality in the spirit that love can't be friendship.