Trying to fix a friendship after a miscommunication issue last month she won't talk about, what can I do to fix things?

This is a long complex issue; I'll sum it up by saying I met this girl were going to date but didn't happen, I retained feelings that screwed with our friendship then after introducing her into my friend group I feel a mutual friend got in-between and made things worse so for the last month she wanted space between us.

I left her alone for a few weeks and recently we've been talking, I wouldn't say a lot but quick short friendly conversations. Few weeks ago she stated that as long as we keep things friendly as they are then "things can go back to normal" between us even though i still don't know what really happened last month to talk to her about it, and she doesn't want that conversation either.

I am due to meet up with her and a mutual friend next week on the third as we're going to be hanging out for a bit since the mutual is in the country, so I hope things would get back to normal hopefully.

What can i do? Is the best option just to wait and do nothing?

Trying to fix a friendship after a miscommunication issue last month she won't talk about, what can I do to fix things?
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