Some ppl in this thread are under the impression that breaking an engagement,
after the L’chaim or the Tenoyim requires a Get.
Absolutely NOT!
This Chasiddishe train of though that it is better to get married & divorced
rather than break an engagement/vort, Is ONLY due to the fact that their will be
Kepeidas, which is either side holding a grudge, due to emotional, financial,
physical, heartbreak, reasons etc.. If the agreement to break up is mutual,
and there is no grudge by especially the girl or boy, etc
and both are eager to give a shtar mechilla, It is Absolute Shtusim
to say in this case, that it is better to get married and divorced than
break the engagement. I am not including mystical opinions,
as i am not very fluent in Kabbalah, it is however my humble educated opinion.