Advice

Why do I consistently feel like he's going to come back, I've seen my therapist and he told me its my emotional side of my brain taking over my rational side of my brain, it's like I feel it deep in my soul that he might but I'm not sure if that's what I want! How do y'all handle this? I've been doing self-talk with my rational side to squash the hope but it doesn't go away and I keep waking up every morning since almost having a full-blown panic attack because of it!! I just want my emotional side to stop, I keep telling myself he's not coming back and it wasn't my decision.