A little concerned that the ending implies that this isn't the first instance of her 'friends' betraying her. She's both happy to have company, but likes her peace. She didn't have a doubt about her 'friends' stance on the rumors, just judging that she was being reckless and inappropriate. She didn't blame herself and was resolute - it seemed like she was in on the reveal at the graduation party.
I do wonder if this gets serialized, if we'll have our first yandere couple. Both of them match each others freak.