Why I mentioned marriage during head injury psychosis?

This is going to sound insane but I mentioned marriage to my recent ex many times after the Concussion. This is kind of bleak but it is coded in my mind out of a kind of fear. “I love you and I feel like I might die with you.”/ AKA till death do us part. This is worth knowing for if it ever happens again. When I wasn’t convincing myself I was invincible? I was convinced I was going to die after the June 7th – 8th concussion.