OP here

I do agree with you, 2, I myself have bipolar disorder and for the most part we mentally ill are usually harmless people as long as we're in therapy and on meds.

However, what worries me is that H has still not really learned how to approach romance and intimate relationships, and his family is in financial trouble, which has made it so that at times he cannot get to his medication, which makes him a bit unpredictable (I can sympathize, however, because my family has been in that situation in the past... with very very bad results). The reason I'm mainly worrying is that H has reacted violently to rejection in the past, and in my own past in my struggle with Bipolar Disorder I have reacted violently (or at least aggressively) to other things.

Ah well, I'm making my moves with A and it's going well. H will find out in when I feel he's ready (it would, at the end of the day, be fucked-up of me and A to hide the truth from him).