A Jane is a quick-witted, smart and (may appear at first) creature. Her sarcasm may make you feel attacked, but she's just checking your reactions: she's studying you. If you have enough perseverance a Jane will trust you enough to reveal to you her real nature: a sweet, warm and sensual spirit that when loves someone will do anything for them. If you have a Jane in your life, be sure she will support you no matter what, but be careful: there are some moral values she cannot give up even for you.
It's not: "A friend is a treasure" anymore but: "A Jane is a treasure".
Do not leave her. She might be hard and bring chaos to your life sometimes but she always pay pack for it.
You have a Jane? Man... How I wish I could have a Jane too in my life. You're so lucky to have someone that supports you so much.