Hurtin over this!

cannot for the life of me figure out how some people can be like they are. Especially my own family. I have never had a great relationship with my mama but this was the final straw. I will never speak to her again and she will NEVER see my kids again. I'm still in shock that it happened..Let me start from the beginning because I really need to get this out...My mama is an alcoholic...I have tried talking to her and getting her help but nothing works. She hasn't always been like this but the last couple of years have gotten progressively worse. She starts drinking everyday around 2 pm and doesn't stop..I don't live in the same town as her, I live about a 45 minute drive away so I can't just visit her all the time. But I do go when I can. She NEVER visits me. I have a 17 year old sister who is slightly disabled and she is my heart. I let her come stay with me for weeks at a time during the summer. Mama always wanted to send her to me just to get rid of her but I welcomed her..Shes my baby sister and I have always done everything I can for her.
Here's the problem that I'm SOO hurt over..My boyfriend recently got a lump sum of money from a lawsuit and has been doing things for us that we haven't been able to do. He bought me a used truck that's really nice and mama seemed happy about it. WELL, last week me, my boyfriend, his niece, and Nathan went to a Braves game in Atlanta. I added pics to my MySpace the next day. She calls me and cusses me out because we went and took Fr eds niece instead of my sister. Well we had to get 4 tickets cause u couldn't just get 3 and like I said, she lives outta town. So Bianca just ended up going...But besides that we coulda took whoever we wanted and it shouldn't have mattered to mama. She left me all kinda ugly messages on Myspace...So after that phone call I deleted her from Myspace & Facebook. She always had something smart to say so I just prevented that problem by deleting them...So she calls me again like 2 days later demanding that I give her $100 that she GAVE me 3 years ago on my deposit to my apartment, and her tv back that she let me borrow. Now I have borrowed money since then and have ALWAYS paid her back....This wasn't a loan....she gave it to me helping me out...So i tell her no on the phone and leave it at that...The next night she gets my stepdad to call me asking about the money..I tell him I don't have it, cause really I don't. She calls me back telling me that if I didn't bring her that money right then she was calling DFACS on me and would tell them anything to get them to take my kids. That she just didn't want me to have them..Oh this pissed me off..I just hung up...This witch calls my boyfriend saying the same thing...So now he's pissed cause no one wants DFACS in their shit and we know our kids are well taken care of..I mean my own MAMA would have done this. So I tell her I will bring it in the morning. She tells me I better be there no later than 8:05 or she was calling DFACS. So we left a lil late the next morning. She texts me talking about u must think I'm playing...I'm balling my eyes out the whole ride there and my Boyfriend is like ur not getting out the car...Uh, duh..so my stepdad comes out talking bout I'm sorry and I think its a bunch of BS, but please don't tell her I said that...I told him not to worry cause I would not be talking to her...I just can't believe all the crap came from my mama and I really don't ever wanna talk to her again...I feel soo much better for finally getting this out....I hate that I don't have the kinda mama that most do but I have my kids & BF & that's all I need!!