Hoo dang that was a very deep story that tugged on the heart strings, nice job! I think the ending is quite abrupt, and whilst the idea of waiting real world seconds for someone to come back is cool, I had to just scroll through Twitter whilst those sections were going on, and as a fast reader I often finished the lines long before the next one appeared - it would be good to have a "speed reader" mode which halved the time between lines. Although saying that, it was a really good effect that sold the idea of someone "talking" to you directly.
Overall, great job! :)