A while back I read a TwiDash story and I can't remember what it was called and it doesn't seem to be in any of my bookshelves. So help finding it would be appreciated. I don't remember a lot of specific detail, I believe it was a one shot and it had Twilight and Rainbow spending time together when Rainbow kisses Twilight and she freaks out. As they sit and talk it turns out that Rainbow and all of their friends thought she and Twilight were dating and Twilight was the only one that didn't realize it. Then she starts thinking back over the last few months and noticing the things Rainbow had been doing and connecting the questions their friends had been asking with the idea they were dating. Unfortunately I don't remember many more details than that.

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Sounds like Twilight Learns a Secret, which takes me waaaaaaaay back in the fandom.

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That was exactly it and I'm an idiot because it was in my favorites. Thanks!