Did people seriously fail to notice the small skip she made in the last panel? She's skipping with joy... she's not sick, she is flushing from nearly being asked to marry him and is happy.
The moment he started running away I though "Oh ok, he's gonna get hit by a truck so that MC doesn't have to kill him himself." And well... that's exactly what happened. wow...
Oh great... the author is trying hard to justify all the fucked up BS she's done so far. Soooooo sympathetic.....
Let's not forget that she gets off on the mental abuse she causes...
But watch as the stalker shows up again somehow, MC saves her and all she's done is forgotten.