"Te amo" is a phrase in Spanish and Portuguese that means "I love you". However, it is important to note that "te amo" is a more intense and intimate form of expressing love, and should be reserved for serious relationships and immediate family members. In contrast, "te quiero" is a more casual way of expressing love and can be used with good or close friends, significant others, and extended family members. It is also the most common way to say "I love you" in Spanish. It is important to use the correct phrasing depending on the context and the level of intimacy in the relationship.