Questions & Answers about Él dice que se enamora de ella.
Why does it use de instead of con for "with her"?
In Spanish, the verb enamorarse (to fall in love) is always followed by the preposition de. Even though in English we say "fall in love with", Spanish literally says "to enamor oneself of" someone. Whenever you talk about falling in love with someone, you must use enamorarse de.
Why is there a se before enamora?
Enamorarse is a reflexive verb, which means it needs a reflexive pronoun like me, te, or se. Without the se, the verb enamorar means to make someone else fall in love with you. Adding se shows that the subject is the one experiencing the internal process of "falling in love."
The translation says "is falling", but isn't enamora just the simple present tense?
Exactly! In Spanish, the simple present tense (se enamora) is frequently used to describe actions happening right now. While you could also use the present progressive here (se está enamorando), the simple present is perfectly natural and common to mean "is falling."
Do we really need que here? In English we can just say "He says he is falling in love."