For example, with the language of attachment, most people are referring to emotional attachment, which the Buddha analyzed into a whole cluster of positive factors-such as affection, gratitude, trust, and commitment-as well as some negative ones, such as clinging and emotional bias.
But if you can learn to look for happiness inside-which means straightening out your relationship with yourself-that takes a huge load off your relationships with others. The sense of affection, trust, and commitment you feel for people who are close to you won't cause you to suffer.
So when you look at the language and level of the Buddha's teachings on attachment, you'll see that he wasn't advising against special friends or monogamous relationships. He's just telling you not to cling to those relationships in a way that will cause suffering.