Don't leave her alone! Give her time to grieve but keep her busy too. That is so sad. We need better understanding and services to people with mental illness. Sadly as a former public school educator 8/9 schools I was in did NOTHING about bullying. This is why I have become a homeschooling advocate.
Laura I am so sorry for your friend's family and friends and to you. I don't have any personal recommendations but I would recommend calling into a Catholic radio show. I'm not sure what show to recommend but the website address is ewtn.com/radio . There is also catholic answers. I'll be praying for all of you. God bless.