Help badly needed.

Okay so i'm not sure where to start but I really need your help. My Fiance of a year has these really bad... I guess moods you could call them. They happen when he's been crying and has gotten upset or such along the lines. His eyes start darting everywhere, he speaks like his in a third person point of veiw and starts talking in a different voice as well as hysterically laughing and the screaming.

An example is the last time this happen he started talking about his mother said it's best to eat your veggies and continued to ask me if I did.

Now I love him so much and I'm not leaving him for this, I just need to understand more so I can be of more help to him. He refuses to see a professional as he was sent to one once and hates it.

Neither of us know what it is and I'm hoping someone out there has any idea at all, it would be so appreciated.

xox