I don't know Boca Raton, so I can't comment on it. I'd guess, however, that some areas are safer than others. That's pretty much the situation anywhere.
And I don't know your own situation, so I'm can't get into the question of whether a girl who's just turned 17 should be living on her own. Maybe yes. Maybe no. I don't know enough to say, though I will go slightly out on a limb and say that a majority of 17 year old girls probably aren't ready yet.
But what I will say is that you'll have many far more risks to your safety than housing location. Partly, it deals with your capability of living by yourself. Largely it deals with who you associate with--your friends and others. It deals with your personal choices regarding living, entertainment, and lifestyle.
In the United States in 2007, the leading causes of death were heart disease, cancer, stroke, and chronic lower respiratory disease. See http://www.cdc.gov/nchs/data/hus/hus10.pdf
Among persons aged 15-24 (that's you) , the leading cause of death was "Unintentional Injuries" at 47%. Homicides accounted for 16% of deaths in that age group. About 11 out of 100,000 people in that age range died from homicides. I'm guessing (but it's only a guess) that most were male.
Point is: while it's understandable to be concerned about the safety of a community, there are far greater risks that you'd be facing. Make sure you're addressing those first.