I'm not going to show my boyfriend a letter from his father
I hope you are joking. Why don't you want to show it to him?
I don't want to feel bad for him, he can live without his father
It's hard to watch someone you love get hurt, but you shouldn't hide the letter from your boyfriend. He will be upset if he finds out that you hid the letter. Just give him the letter and be there to support him.
I don't want to hurt him more and I don't want him to be upset.
You need to do the right thing even if you will have to see him upset. You can't protect others from bad feelings.