Issues with my brother

My brother and I are only 2 years apart and were very close in childhood. Once he went to high school he started to bully me. When I was 16 I had my first boyfriend and he would make fun of me and him in all sorts of way. I have always been shy and timid and pretty quiet. I always ignored him. He would always call me fat and ugly and it lowered my confidence eventually. Every time we were with cousins, he would always have my guy cousins and him gang up on me and make fun of me. I used to spend hours crying in the bathroom or crying myself to sleep. Eventually I became stronger and learned to ignore his opinion and live my life. I'm the oldest (27) my brother is 25 and I have a sister who is 20. When me and my brother grew apart, he became close to my sister. They were like best friends. I was able to finish college on time but my brother still has not finished and probably won't finish. Every time he had a gf in the past he would steal my parents credit cards to buy her expensive things and he would buy stuff to make his car look nicer to impress her. One time he even used my debit card without asking me to put gas in his car. He would lie all the time even to my parents. Well now he's making good money and dating a new girl who is a gold digger. She was initially my sisters friend but she betrayed her bec she's a gold digger and started dating my brother. She is 20 and has never worked a day in her life. She brags on her twitter that she doesn't need to work when her bf (my brother) gets her everything. My brother bought a brand new Lexus back in Dec and she takes his car to college every day and got into an accident with it. Mind you she has a car of her own but bec she's embarrassed to drive it she pretends she owns my brothers car. Well my parents and me and my sister do not like her bec she's robbing my brother for all his money. She's a gold digger and she openly brags about it. She also brags about having her man whipped. Whenever we go to visit family out of state, my brother never goes with us anymore bec she doesn't let him. God forbid we tweet anything that's not even about her or him she will have a fit and my brother will come and yell at us and start throwing a tantrum. I'm 16 weeks pregnant and separated from my husband bec he abused me while pregnant. He was throwing that in my face how he knocked me up and beat me. I'm already hurt and although I have become a lot stronger, it still hurt when your own brother can't be supportive and wants to throw nasty comments due to some girl who is only using him. He does it all the time. My sisters boyfriend proposed to her and she was happily showing him her ring and he just brushed her off. He's so selfish and only cares about himself. I have never said anything mean to him but last night I lost my cool when he made that comment about something that is very personal and hurtful to me. I told him he's a low life and uneducated and too dumb to see he's being used by a girl who is his baby sisters age!! I let all my anger out. So he got pissed and left the house. My mom got mad at me bec she thinks I shouldn't have said anything to him while she did admit that he started it. But why am I expected to stay quiet? It's not fair. My parents have always been supportive of him and that's why he's turned into this monster!!!! My sister has been mad at him for the past few weeks bec he fought with her too bec of his gf. My sister and that girl don't talk anymore bec she said some rude things to my sister too. I hate that bec I never cry in front of anyone people think I'm made of rock and have no feelings. I cried myself to sleep last night after a really long time due to my brother. I can't wait till this gold digger finds a guy who makes more money than my brother and drives a nicer car so she can dump him. That's what he deserves. I can't stand him honestly. I don't blame the girl. There are many girls out there like that but you have to choose wisely. He's the dumb one who can't see through her