Healthy relationships are about emotional attunement. You show and give attunement with your voice, your facial expressions, and your body language.
Withdrawing or disconnecting from your partner, whether physically, mentally, or emotionally, is a coping strategy developed early in life; and usually for good reason(s). In some way, withdrawal helped you feel safe. Whether there was a lot of yelling going on, inconsistent attention, abuse, withdrawal, or something else, avoiding situations was likely a healthy choice as a child.
Now, as an adult, take a few minutes to consider these questions: How does withdrawal/disconnection/lack of attunement serve or harm your life? How does it play out in your relationships at home, at work, socially? You might make a list of how it helps, how it harms, and what is interesting about it that neither helps or harms.
Your traits are useful, when you use them in the right volume in the right situation. If someone is behaving aggressively toward you, withdrawing may be the best response. If your partner wants to talk about a topic with you, withdrawing likely won't be the best response. You always can say you'll talk about it later -- just be sure you go back and do so. Otherwise, that's just another form of Still Face.