Here's a breakdown of the sentence:
* watashi (私): I
* wa (は): topic marker (indicates the subject of the sentence)
* anata (あなた): you
* ga (が): subject marker (indicates the object of the verb)
* suki (好き): like
* da (だ): copula (indicates a state of being)
* to (と): quotation marker (indicates the following phrase is a thought)
* omou (思う): think
The sentence is structured in a way that emphasizes the speaker's feelings and thoughts rather than being a direct declaration of love. It conveys a sense of uncertainty and hesitation, which can make it a more subtle and less intimidating way to express feelings.