If You Could See the Sun by Ann Liang

No secret is safe.
Alice Sun has always felt invisible at her elite Beijing international boarding school where she's the only scholarship student in a sea of uber wealthy classmates, but she has a plan. Be top of the class, attend a prestigious University, secure a killer job and finally lift her family out of poverty. Then her parents drop a bomb- they can no longer afford her tuition even with the scholarship. But that's the least of Alice's problems because she has started uncontrollably turning invisible. As in, completely, physically invisible. 
Loved, hard cover.