Enlist the Help of a Friend
Friends are always there for each other, through thick and thin, and definitely for engagement ring shopping. Grab a best friend or your sister and enlist her help in a) picking a ring style that looks gorgeous on you and b) sharing that information with your BF. A friend can get away with being a little more blunt than you can be, especially when it comes to this topic. Make sure they know what you like so they can help drop subtle hints, or perhaps really blunt tips to your partner.