I can offer some general insights into potential reasons why your boyfriend might have deactivated his Facebook and is not talking to you after a fight.
Need for space and reflection: After a heated argument or fight, some people prefer to take a break from social media and communication to process their emotions and thoughts. They might need time alone to evaluate their feelings and figure out how they want to move forward in the relationship.
Avoiding further conflict: If the fight was intense, your boyfriend might have deactivated his Facebook and distanced himself to avoid saying or doing something he may regret in the heat of the moment. It could be a way for him to prevent further escalation and give both of you some breathing room.
Emotionally overwhelmed: Arguments can be emotionally draining, and your boyfriend might be feeling overwhelmed. He might not be in the right frame of mind to engage in conversations or social interactions until he feels more emotionally stable.
Fear of saying the wrong things: Your boyfriend might be worried that if he engages in communication while still upset or angry, it could lead to more misunderstandings or worsen the situation. By taking some time off, he may hope to calm down before addressing the issue.
Communication style differences: People have different communication styles when dealing with conflicts. Some individuals prefer to withdraw temporarily to gather their thoughts, while others want to discuss things immediately. It's possible that he falls into the former category.
Personal issues or stressors: Aside from the fight itself, there might be other personal issues or stressors in his life that are affecting his ability to communicate or engage on social media.
Need for reevaluation: A significant disagreement or argument can sometimes prompt people to reassess their feelings and the relationship as a whole. He might be taking time to evaluate the relationship's direction and whether it's something he wants to continue.
The best approach in such situations is to give him the space he needs. Avoid pushing for communication or trying to reach out excessively, as it may only add to his stress. Instead, focus on taking care of yourself and allowing both of you time to cool off. When he's ready, he will likely reach out to discuss the situation and work through any issues that arose during the fight. If, however, he remains unresponsive for an extended period, it may be worth considering having an open and honest conversation about the relationship when the time is right.