I think the reason she left her hometown in the first place was because her lover ended up in a relationship with her best friend... "I left my universe standing there holding the hand of my best friend". Agreeing with VegasJames, I think the "crash and burn" refers to the instant heartbreak in being rejected (crash) and the slow and sometimes painful process of getting over it (burn). Now she sees the relationships that lie ahead of her having an inevitable "Crash and Burn".
I think the reason she left her hometown in the first place was because her lover ended up in a relationship with her best friend... "I left my universe standing there holding the hand of my best friend". Agreeing with VegasJames, I think the "crash and burn" refers to the instant heartbreak in being rejected (crash) and the slow and sometimes painful process of getting over it (burn). Now she sees the relationships that lie ahead of her having an inevitable "Crash and Burn".