Te amo. - I love you.
Te quiero. - I love you.
Never use the verb encantar to say you love a person. Encantar is used to express the idea that something delights or thrills you.
Me encanta esta bufanda. - This scarf delights me.
Note that the verb is conjugated for the third person because it is the scarf that delights.
This sentence is often translated "I love this scarf," but that it not the literal rendering.
Gustar works like this also. This verb means to please, not to like.
Me gustan los libros.
Literal translation: To me are pleasing the books.
Common translation: I like the books.
Related reading: Verbs that Conjugate like Gustar