How would you explain bipolar to your partner?

 I met my new partner while manic and he kept telling me how much he loves my wild, vibrant, impulsive personality etc, and I said just wait.. 
He knows I have bipolar, and now I'm slipping into a depressive phase and I don't think he gets it fully yet, he thinks it's just a bad day or me withdrawing or pushing him away is me trying to leave him, but it reality I don't want anyone to have to put up with this. 
He also tends to fuck I'm head fucking him a bit, but it's not intentional I'm confused enough in my own head. 
I wanna make this work but I don't know what to do, and now I'm to tired and unmotivated to do anything or be the girl he fell for.
Any advice would be great thanks.