Thoughts on Whitney and Heather's friendship?

Okay, so in tonight's episode, S3ep13, Whitney invited Heather over to reconnect, and Heather was like "we've lost trust" and "it will never be the same". To me, it all seemed good between them until the conversation about the black eye persisted. Thoughts?

Should Heather forgive Whitney? Or, is she valid in wanting space due to the friendship break that she wasn't aware of?