The Ever-Dark by El Hoffman:
 
Violet Evans has always felt like an outsider among her family, her friends, and in the world as a whole. But when she stumbles into the magical realm, she finally starts to feel like she has a place in life. Until she accidentally shuts the portal home, cursing the world with the ever-dark: a sky that stays dark purple all day, with the sun frozen on the horizon, never rising, before shifting to black at night.

Determined to right her wrongs, Violet sets out to reopen the portal with a mind-reading pedicab driver, two new friends, and Allen, her immediate love interest.

But if she reopens the portal, what will be waiting for her on the other side? A family that hates her? A life she never truly belonged in? Or something far worse?