This is called the personal a. In Spanish, when a person (or sometimes a pet) is the object of a verb, the object is preceded by a.
- Veo mis libros. ("I see my books.")
- Veo a mis amigos. ("I see my friends.")
- Amo la vida. ("I love life.")
- Amo a mi novio. ("I love my boyfriend.")
To not include it would be incorrect grammar, so it can't/shouldn't be omitted.