Your best friend got engaged. Hooray! Welcome to a world full of engagement parties, bachelorette party Facebook groups, dress shopping and bridezilla. The news is hot, their post on IG is blowing up and you need to act fast. Here are 10 cool gifts to send to the happy couple. 1. Champagne (Wine.com - $55)They popped the question so now it’s time to pop bottles. Regardless of how close you ar…