I'm going to break a girl's heart
Is there a good reason that you need to break her heart?
Yes, I think strongly, there's nothing that she could do to improve for me to not want to forget about her
I see your point, but try to let her down gently. You will feel better if you end the relationship without being overly hurtful.
I should tell them that I need some time before I can get back to them with my conclusions.
I think that you should just try to be gentle about it. It is wrong to try to break her heart.