Engagement is just a manner of expressing formal
consent between the two sides. It entails no legal rights whatsoever. In other
words, breaking it would not make either side liable.
It is improper for the two to hold hands or hug unless they
get married. They are not allowed to be intimate unless the two are legally
united in a marriage bond. They can talk to each other on the phone or
personally in the presence of some elder. However, this should be in limits and
as much to the point as possible.