My best friends brother killed himself?

ok so my best friend was speanding the night at my house.her dad came around 2:30am.bridget and i walked into the living room where he was standing and my mom told me to go into my little sisters room.now.so i went into the and bridget got all packed up i gave her a big hug,told her i loved her,then she left.once they were gone i came out and asked my mom,"whats going on?"and my mom said,"Bridgets brother died."so the next morning my mom woke me up and told me i had a phone call.i got up and got the phone and it was bridget.she was crying.she told me,"Laura,my brother died."and i said,"i know bridge.im sorry.r u going 2 b allright?"and she said,"I dont know."so l8r my friend serena called.she told me he killed himself.no shot himself.she thinks it because of his girlfriend.now like my whole town knows.i feel terrible.what should i do 4 bridget?