i would get if i were you maybe a cherry blossom tree... it can go any direction you want , it be girly, its nature its a unique tree , and for scarsi dont think you would want to point them out even more am if you want to hide them.. a cherry blossom will for sure take away the eyes off the scars and would go on the tree... my opinion
If the scars are white you could try a white tattoo, only the outlines would be actually visible so If you chose thorns, a snake or a tribal it could look good and relatively discreet.
redemption. big and in pretty cursive vertically tattooed across your arm.<br />
OR you can have a sc<x>ripture font and research your fav saying something very meaningful to you something like (not really this but this is just to give you an idea.) how about something relevant to overcoming you cutting?<br />
"Be more concerned with your character than your reputation, because your character is what you really are, while your reputation is merely what others think you are."<br />
- John Wooden
maybe a meandering henna-style pattern?
Something Celtic with a lot of criss-crosses in the pattern