my on and off girlfriend of the last 2 years has it, and she self medicates
my own experience is that my girlfriend (ex, currently, may not be, may be, who the f**k knows) has absolutely no interest in bettering herself. no medication, no doctors, just weed and xanax. she is almost entirely closed to the idea of opening up and changes her mind about how much she loves me every 4 months. she's either madly in love with me and i'm the greatest thing in her life or i'm completely worthless to her, there's no middle ground.
when she mentions she's "crazy" you should take it seriously, but crazy can mean a lot of different things. everyone with a mental illness or neurological difference deserves love. no matter how "crazy" so if you have feelings, give it every honest effort you can. but hold her to a standard of being an adult. yes, she may have issues in her life, it may be difficult, but that doesn't mean she's incapable or immature. she could be a loose cannon like my ex, or, she could be a lovely woman with a lot going for her who just experiences some emotional breakdowns. who knows, you could fall in love. give it every chance it deserves.
and one more thing - don't let it get too intense too soon. nobody falls in love within 2 weeks. common problem i had with her.
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If Jesus died for my sins, then I should sin as much as possible, so he didn't die for nothing.