Engagements have the word Engagement or Getting Engaged for a reason. Marriages are really expensive, and if you'd want to break up and get a divorce, you'd have to practically buy yourself out of it. All the items you have, you have to split up, and sometimes end up getting in court for. In Engagements youve still put yourself in a higher level of bonding, but you're still free to do whatever whenever. Easy life!
in other words engagements are actually pointless unless you plan to actually marry the other person..
let’s just be happy that they are happy… what they do from now on is their business and we shall support them