Keep in mind that American culture is overwhelming in may ways: advertising, marketing, and such that we Americans have become somewhat immune to tend to cause overload in the mind of Latinas. Separation from family and friends is also traumatic for many. American culture tends to transform a lot of people into nasty, competitive keeping up with the Joneses maniacs, and the charming Island girl can easily turn into a rather poor imitation of a nagging American wife. Your Dominican wife will tend to spend most of her time watching telenovelas and chatting on the phone, because the US is a very lonely place for people who have never been lonely.
Space Mountain is fun where it is. If you were to uproot it and replant it in your front yard, it would tend to lose its charm and appeal. Most people, both here in the US and there in the DR have only a rather vague idea of what they want out of life, and quite often they get what they though they wanted and it turns out to be a bit of a nightmare.
The US government does not want unskilled Latinas, especially Dominicanas, to immigrate, and makes the procedure expensive, time consuming and complicated. It may be worth the bother for you, but you seem far too enthusiastic. It is not easy to find someone who is compatible, it takes time and effort.
Love and passion are rather different things. Passion and marriage do not always fit well together. Often they are mutually exclusive. The Great God Horn is a powerful deity, but treacherous. Time and the environment changes us all no matter who we are or where we live, and not always in the same ways and at the same pace.