After forgiving the person, do I have to continue relationship with the person, even if I don't want to?

Forgiving someone is an important step in releasing the burden from our hearts, but it doesn't necessarily mean that you have to continue a relationship with that person. Whether or not you choose to continue a relationship depends on several factors, including your feelings and the dynamic of the relationship. 

It is important to release pent-up emotions and then you can choose what is best for you.