When someone leaves you for another person, it is often referred to as "cheating" or "infidelity." This behavior can also be described as "betrayal," as it involves breaking trust in a relationship. Such actions can lead to emotional pain and relationship breakdowns.
When your boyfriend finds someone else and leaves you this means that he is not interested in you anymore and he wants to move on and there is just physical relationship in his mind that matters for him.
Not necessarily. If they left you for someone else that would indicate they are just moving on - as you should.
When you sell someone else's product, it is called "reselling" or "retailing."
file for child support
Get over it and find someone else.
Someone who picks on someone else is called a bully. They are not nice people.
When someone else writes about someone who is deceased, it is called a biography.
Envious.
Copying someone else's work without permission is called plagiarism.
AutoBiography
And you care why?
the person who leaves