Thoughts on "The Man in a Case"

I thought this plot is quite amusing. While Varinka seems to be a carefree, lively girl, her fiance Byelinkov is describes to be so stiff, strict and almost emotionless. Most importantly, Varinka is very excited about the wedding and is clearly proud to be married to Byelinkov, whereas Byelinkov himself seems to think of the marriage as something he would have to eventually do in his life, it's like you have to wake up in the morning, have at least three meals throughout the day and then go to bed at night. To me, he seems like that kind of a man; the kind who plan out his day, heck, he plans it out down to the minutes! Then follows it like a programed robot. I'm pretty sure he would go through with the wedding, since it seems to be on his to-do list already, but poor Varinka is going to be miserable in this boring marriage.
On a side note, he reminds me of Harold Crick in the movie Stranger Than Fiction. This guy even takes it to the extreme of brushing "each of his thirty-two teeth seventy-six times. Thirty-eight times back and forth, thirty-eight times up and down" (Stranger Than Fiction).

Anyway, back to Byelinkov. When I read the script at home, I was so confused when I reached the last scene of the play. So, when Varinka and Byelinkov were still talking (somewhat) happily together, he wrote a note that every year on that same day, he would place a lilac in her hair (a way of expressing his teeny tiny little affection he has for her I guess), but after they trifled over the bike and she went off, he ripped the note off, threw it away, then "carefully picks up each piece of paper and places them all in a small envelope" (25, Wasserstein).
And "girls are hard to understand", they say.
After examine Byelinkov's characteristic again, I think the reason why he acted the way he did could be because:
1/ He'd already told Varinka about the lilac thing, and she'd seen him writing it down, which forces him to have to really do it every year, keeping the note just in case he might forgets.
2/ He seems to be a neat freak. He can't stand having pieces of paper all over his pretty little garden. And he just happens to have an envelope to put all the paper pieces in, he might even recycle them later, who knows?!
3/ He ripped the note out of momentarily anger just to soon regretted his action.