An Angel deserves a heavenly sparkler. Alessandra Ambrosio and boyfriend Buck Palmer announced this week that they are engaged after two years together, with the jewelry designer popping the question while the pair were on vacation in Indonesia. “I’d choose you in this life and every life. Here’s to forever, my love. 💍✨,” the Victoria’s Secret model captioned a joint Instagram post, showing off her dazzling diamond ring as well as the massive heart Palmer constructed from red flowers on the beach for the proposal. In a second post, Ambrosio, 45, gave followers a closer look at her engagement ring, which experts told Page Six Style looks to…