Dreams involving ex-partners can often reflect unresolved feelings, lingering emotions, or even aspects of your past that are still influencing your present life. In your case, there are several layers to consider.

1. Unresolved Feelings: Your dream suggests that although you have moved on, there may still be some residual feelings or thoughts regarding your ex-boyfriend. The fact that he appears with his new girlfriend and there is tension indicates that you might be processing feelings of being moved on while still feeling a connection or unresolved issues, especially given his past attempts to contact you.
2. Reinforcing Boundaries: Your statement, “why can’t you just accept that it’s over between us,” reflects your desire for closure and to reinforce the boundaries you have set. This could be your subconscious confronting the past and asserting your need for independence and emotional space.
3. Psychic Awareness: Since you mentioned your psychic ability to sense others' thoughts, this might suggest that you are picking up on emotional residues from your past relationships. It could be a manifestation of your awareness of their potential feelings about you, which may be causing some irritation or discomfort.
4. Themes of Control: Your ex's insistence that he’s “not letting you go” could symbolize feelings of control or possessiveness that you might have experienced in the relationship. This could also represent a struggle between your past and present self, where you assert your autonomy over past influences.
5. Toxicity from the Past: The appearance of your previous toxic ex in the dream further emphasizes the theme of confronting past relationships. It could indicate that you are reviewing your past choices and how they have impacted your emotional landscape, especially if you have worked hard to distance yourself from such negativity.

In summary, this dream seems to be a significant reflection of your inner emotional state regarding past relationships. It might be beneficial to continue focusing on your healing journey, reinforcing your boundaries, and ensuring that you are fully embracing your present without the shadows of the past influencing you. Consider journaling about these feelings or talking to someone you trust to further process what these figures and emotions mean for you moving forward.