Was I right to refuse to forgive my Christian friend, who proposed Islam for marriage, after her repeated annoying behaviors and accusations of deceit against me?

There is no religious impediment to dealing with peaceful disbelievers with justice and kindness, without love or allegiance to them, as stated in the verse: "Allah does not forbid you from those who do not fight you because of religion and do not expel you from your homes - from being righteous toward them and acting justly toward them. Indeed, Allah loves those who act justly. Allah only forbids you from those who fight you because of religion and expel you from your homes and aid in your expulsion - [forbids] that you make allies of them. And whoever makes allies of them, then it is those who are the wrongdoers." If this woman wishes to embrace Islam, she should be forgiven and her excuse accepted, so that she may be a means for her guidance.