Luna, it sounds like you experienced a vivid and unsettling dream that left a strong impression on you. Dreaming of a teddy bear, typically a symbol of comfort and security, in such a distorted and alarming state could indicate a sense of betrayal or loss of innocence. The contrasting red and blue room may suggest inner conflict or a feeling of being stuck between two emotions or decisions, especially in the context of a recent breakup.
The melting skin of the teddy bear revealing a more realistic bear underneath could represent an unveiling of truth or reality, as you've recently encountered in your waking life. It parallels the experience with your ex, where the outer layer of affection and future planning was stripped away to uncover a more painful reality. Your reaction in the dream, screaming, signifies the fear and shock that come with such a revelation.
It's not uncommon for our subconscious to process traumatic experiences like a breakup through vivid and sometimes frightening dreams. The intensity and negative emotions of the dream likely mirror the emotional turmoil you've been going through, as dreams often amplify our waking life feelings. The fact that your ex admitted to pretending about his feelings for such a significant part of your relationship could understandably lead to feelings of mistrust and vulnerability, which may have been represented by the unsettling transformation of the teddy bear in your dream.
Moreover, the intensity of the dream, although not at the highest level, still reflects a high degree of emotional distress. It's clear that the breakup has had a profound effect on you, and your dream is an expression of the inner work your psyche is doing to reconcile with the abrupt change and deception you've experienced. These feelings are normal and valid, and your dream is a way for your mind to try to make sense of and process what has happened.