Dear Twilight Sparkle,
I greatly enjoyed our outing together. I do hope that you feel the same. If I overstepped my bounds, I apologize; if I understepped my bounds, you'll need to let me know, because I've never been very good at finding them either way. In any case, if you're interested in meeting again, do let me know. While my work in Canterlot keeps me remarkably busy at all hours, I might be able to slip away for a day at some point.
Yrs. sincerely,
Liminal StateP.S. I am aware that I may have made a less-than-positive impression with some of your friends. Please let them know that I hold no personal ill will towards them. As you may have already noted, I am not by nature the most genuinely social pony. That's why I was so unpleasant when the talk of my cutie mark came up. There is a story behind it, and I won't tell you the full details, but: I discovered once that my talent was to show a different face to others. For a time I made full use of that to do things I came to regret, and then I spent a long time rejecting it. It's only recently that I've started to get more in touch with that part of myself and, I hope, to use it for something like good.
P.P.S. Lack of personal ill will does not preclude dislike of apple-derived foods.