Is it normal i am worried about my friend

She is bipolar and an alchoholic and a really good friend to me since I moved next door to her six years ago. She has a rageaholic husband who gets angry when she talks to me or anyone else on the phone.He is very angry she went and had coffee with her daughter she gave up when she was a teenager. Her 19 year grown son is worried about her too,because her manic depressive phases are lasting longer and longer and his father gets mad when he visits his mom.She keeps doing weird stuff like walking around in the dark for hours when it is freezing out with no coat on .Her son tried to make her come with him , but she won't.She keeps talking about mortality and how she misses her father and wishes she could see him in heaven.She almost left her husband when he cheated on her with his bosses wife and got fired. But she went back after having an affair of her own.
She has been staying at my house for the past week, because I found her walking around in the dark loaded and she looked like he beat her up. She got mad when I asked her but doesn't want to go home. I got her to go to A.A. She introduced me to my husband, who is a great guy. She helped me find a job and a million other things. So yeah I kind of owe her one.