Am I the worst brother ever

my brother (who's 9) was in a crash car and both my parents died but he is a survivor. Child services call me asking if I want take him in or he'll be in foster care. I didn't want to take him in because my girlfriend (of 2 years) just move in with me and space is pretty tight. And we (we're both 19) both work full time and we decided not to take him in. Plus my girlfriend and me doesn't like kids and thinks money would be even tighter.

My bro is in foster care now. When I call him today and he couldn't talk because he was "busy" with homework. I know for a fact doesn't do school work. This happen before and he's not talking to me.

My brother's foster parents call me saying his grades are dropping (he use to get c's and he's f's subject he's taking) and he's picking on other kids at school. Is this all because I wouldn't be his guardian?

Now I'm feeling like the worse brother ever.
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so I call my brother today ands he ask me straight up why I didn't take him in. I think he was crying a bit. I didn't know how handle it so I hung up on him. could I have say something to him?
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I talk to my girlfriend about what did and she said tell him to be a man and over it. As for my brother call him to say sorry and he call a asshole and hope I drop died.Then hung up. I'm not sure what to do anymore, help
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I went on my bro's facebook and he had this whole post about me and my girlfriend saying we're assholes and can't be trusted. He also said my girlfriend is a dumb slut for sleeping with me. I was going call child servces to see
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if I could to see talk him in but he can forget it now.
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My brother's foster mom saying he caught shoplifting headphones and is suspended getting in a fight at school. She said he's out of control. His grades are horrible and getting worse by the mintune. Does have something to do with me.
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my brother went to visit me and my gf. I tried make get him to his homework (the school theating to hold him back if he doesn't keep up) he tell me to f*** off and that I'm not his dad. Then my girlfriend get involved saying
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he couldn't talk to me like that. It cause this huge fight. Until he got piss off and went to guest room. He went home the day and hasn't talked to me since. Did I do something wrong?
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his foster parents kick him out because of the way he's treating everyone. I had no choice but to take him in. He's still resenting me and my girlfriend tho. He's lipping off to us and I just let him have it told himhe either straighten up or he's on the
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streets. He hasn't talked to me since. What's his problem?
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So my girlfriend went on a trip with her friends she'll be back in 2 weeks. All of a sudden my brother went from a evil child to a angel. He's listening to me for once. Behaving at school. I haven't any from his school. What going on?
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So found out my girlfriend cheated on me well she's on her trip (her friend told me). Should I dump her? I know it would make my brother a lot happier.
Am I the worst brother ever
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