family

you how sometimes people have a rough upbringing and it contributes to their difficulty maintaining healthy adult relationships? well I've prayed and prayed hoping god would light up a good path to take regarding my family. so here's the breakdown, cause I feel at the moment that finding thus group is Gods way of saying to turn to my peers.

I never had grandparents, a father, aunts or uncles etc. just my mom and brothers. my brothers witnessed my father trying to kill my mom. well, in fact, he thought he killed her. stuffed her in the closet in front of us, then stabbed himself and called 911, saying he did what he did out of self defense. anyhow, this is the sort of stuff we grew up with. needless to say, we were all sort of close, having so few others to turn to for love or support. fast forward 20 something years and I'm expecting my first. I'm 31 and have had my share of dysfunction. my brother, 28 is living with my fiancé and I. he was depressed, not what you may expect from depression, a dejected, quiet, tearful person. his depression had more yelling and scary mood swings. I didn't ask him to leave because I'd hate to be at my lowest and be abandoned by the ones I hold closest. our mother passed away and i sort of became the new matriarch. keeper of "the boys", the photo albums, birth certificates etc. anyways, one night an older brother called and said " I'm worried our brother has done something to hurt himself" so I went to his room and opened the door, and told him,"its okay, he's here ". well, my younger brother and that older brother don't get along, never have. but we love each other, if that makes sense. he proceeds to tell me I have to right to discuss him or what's going on and yell like a maniac. he turns to my and fiancé and asks his opinion. whatever he said in reply (i can't remember what) pissed him off. he balled up his fists, screamed and had a wild look in his eyes, he stood on our bed, and screamed and seemed to lunge toward my fiancé. without thinking, I shoved my fiance out of the room and shut the door so my brother couldn't get at him. I walked away that night with bruises. but otherwise okay. anyways, I worry that he's still depressed and maybe not 100% stable. the problem is this: we have to move: he's saying because I reiterated "that behavior isn't okay, your my brother and i want to be there for ypu but my child will not be raised in a home where people behave this way". he gave back the things I gave him and said he's not moving too. told me I got physical that night and basically kidnapped him by not letting him open that door. I struggle with that because I'm his older, pregnant, sister and don't feel what I did was abusive. I was trying to keep them from hurting each other.

I guess my question is, how do I move forwar? do I ask him to move with us still but stick to my guns? do I let him go live on the streets? I am at a loss. please, advise me?