dependent/medical expenses/1095-A

Hi,

I am looking at claiming my bf as a dependent as he had $0 income last year.

 

If I do this, do I enter his medical expenses with mine? And just add his 1095-A as a second form in that section?

 

Also, with $0 income does he need to file a return? I'm guessing not as all his info would be on my return.  

 

Sorry one last question:  If I do this could I be held responsible for his bills in the future?