The Witch's Tears by Katharine Corr

Can true love's kiss break your heart...?

It's not easy being a teenage witch. Just ask Merry. She's drowning in textbooks and rules set by the coven; drowning in heartbreak after the loss of Jack. But Merry's not the only one whose fairy tale is over. Big brother Leo is falling apart and everything Merry does seems to push him further to the brink. And everything that happens to Leo makes her ache for revenge. So when strangers offering friendship show them a different path they'd be mad not to take it...

Some rules were made to be broken, right?