"Adults have 4 attachment styles: secure, anxious–preoccupied, dismissive–avoidant, and fearful–avoidant. There are several attachment-based treatment approaches that can be used with adults. In addition, there is an approach to treating couples based on attachment theory.
Securely attached people tend to agree with the following statements: 'It is relatively easy for me to become emotionally close to others. I am comfortable depending on others and having others depend on me. I don't worry about being alone or others not accepting me.' This style of attachment usually results from a history of warm and responsive interactions with their attachments. Securely attached people tend to have positive views of themselves and their attachments. They also tend to have positive views of their relationships. Often they report greater satisfaction and adjustment in their relationships than people with other attachment styles. Securely attached people feel comfortable both with intimacy and with independence.
Secure attachment and adaptive functioning are promoted by a caregiver who is emotionally available and appropriately responsive to his or her child's attachment behavior, as well as capable of regulating both his or her positive and negative emotions.
People with anxious-preoccupied attachment type tend to agree with the following statements: 'I want to be completely emotionally intimate with others, but I often find that others are reluctant to get as close as I would like', and 'I am uncomfortable being without close relationships, but I sometimes worry that others don't value me as much as I value them.' People with this style of attachment seek high levels of intimacy, approval, and responsiveness from their attachment figure. They sometimes value intimacy to such an extent that they become overly dependent on the attachment figure.
Compared to securely attached people, people who are anxious or preoccupied with attachment tend to have less positive views about themselves. They may feel a sense of anxiousness that only recedes when in contact with the attachment figure. They often doubt their worth as a person and blame themselves for the attachment figure's lack of responsiveness. People who are anxious or preoccupied with attachment may exhibit high levels of emotional expressiveness, emotional dysregulation (ED), worry, and impulsiveness in their relationships.
People with a dismissive style of avoidant attachment tend to agree with these statements: 'I am comfortable without close emotional relationships', 'It is important to me to feel independent and self-sufficient', and 'I prefer not to depend on others or have others depend on me.' People with this attachment style desire a high level of independence. The desire for independence often appears as an attempt to avoid attachment altogether. They view themselves as self-sufficient and invulnerable to feelings associated with being closely attached to others. They often deny needing close relationships. Some may even view close relationships as relatively unimportant. Not surprisingly, they seek less intimacy with attachments, whom they often view less positively than they view themselves. Investigators commonly note the defensive character of this attachment style. People with a dismissive–avoidant attachment style tend to suppress and hide their feelings, and they tend to deal with rejection by distancing themselves from the sources of rejection (e.g. their attachments).
People with losses or other trauma, such as sexual abuse in childhood and adolescence may often develop this type of attachment  and tend to agree with the following statements: 'I am somewhat uncomfortable getting close to others. I want emotionally close relationships, but I find it difficult to trust others completely, or to depend on them. I sometimes worry that I will be hurt if I allow myself to become too close to others.'
People with this attachment style have mixed feelings about close relationships. On one hand, they desire to have emotionally close relationships. On the other hand, they tend to feel uncomfortable with emotional closeness. These mixed feelings are combined with sometimes unconscious, negative views about themselves and their attachments. They commonly view themselves as unworthy of responsiveness from their attachments, and they don't trust the intentions of their attachments. Similar to the dismissive–avoidant attachment style, people with a fearful–avoidant attachment style seek less intimacy from attachments and frequently suppress and deny their feelings. Because of this, they are much less comfortable expressing affection."