I won't list all of the instances where Eveline expresses fear of leaving, but I will give you a few to get you started. Here are some examples from the text, in order from the beginning:
She had consented to go away, to leave her home. Was that wise?
It was hard work--a hard life--but now that she was about to leave it she did not find it a wholly undesirable life.
Her time was running out but she continued to sit by the window, leaning her head against the window curtain, inhaling the odour of dusty cretonne.
Their passage had been booked. Could she still draw back after all he had done for her? Her distress awoke a nausea in her body and she kept moving her lips in silent fervent prayer.
All the seas of the world tumbled about her heart. He was drawing her into them: he would drown her. She gripped with both hands at the iron railing.
I hope this helps. Good luck with finding more examples.