What does Henry's Ring represent?

Henry's signet ring symbolizes his membership and standing in the Royal Family in Britain, along with the heavy expectations that come along it. It is the power of the ring that drives Henry away from Alex when the latter confesses his love in the lake house in Texas. However, when Alex confirms that he will fight for him no matter what, Henry realizes the difficult choice ahead of him and gives the ring to Alex, showing that he is willing put the royal life behind and forge a future with Alex.