Unless she has some earth in her chart, the temper can be quite unstable... but doesn't last long. Aries are the infant souls of the zodiac, its all about them. They lead, you follow their demands, and give them what they want. Don't argue. No one argues with a baby, so don't argue with Aries - it is pointless. Ironically Libra types have karma with this sign, who will often teach Aries about fairness.
If you find someone who makes you smile, who checks on you often to see if you're okay, who watches out for you and wants the very best for you, don't let them go. Keep them close and don't take them for granted. People like that are hard to find.