Shidduch girl and emunah girl, and anyone else in this situation….
All I can say is that I read once that if you are in such a situation, it means that person was not the one designated to be your life’s bliss.
If you try to think of that, and then ask yourself why would you want to be emotionally tied up with one not going to bring you you happiness, it may mitigate the problem.
In general, people should realize what a delicate thing dating is for many people, and should not take it lightly.
Again, if the person was nice and you had nice dates, but they are shopping around, then their fickleness is something you would not want to build your life upon in a marriage.
I wish both you, and everyone else in this situation, to find the most fantastic person for you this year who is wonderful beyond your wildest expectations!!
Hatzlacha rabbah!