Because you have not described the current injustice, I am not able to say for sure, but I do have this question for you: How severe is the current injustice relative to all others you have faced in your life? If it is very severe, then please note that your forgiving this particular person may take more time and effort. This is ok. It does not mean that you are unforgiving. Please note that forgiveness is a process that can take months if the injustice is severe and if it is recent. Try to take the time to examine this person from what I call the personal, global, and cosmic perspectives in the book, Forgiveness Is a Choice. Taking time with these perspectives may help you in moving forward with your forgiveness of this person.