A more contemporary example could be 'The Hating Game' by Sally Thorne. Lucy and Joshua seem to hate each other at work, which can be considered a form of unrequited negative feelings. But as they get to know each other better outside of work, they start to develop real feelings for each other and it turns into a requited love. It's a fun and light - hearted read that shows how initial impressions can be completely wrong.
Yes, 'Jane Eyre' is also a great example. Jane has deep, unspoken feelings for Mr. Rochester initially, but there are many obstacles in the way. Mr. Rochester also has his own secrets. Eventually, after a series of dramatic events including Jane leaving and then coming back, their love becomes requited. The story is full of passion, struggle and ultimately, the victory of love.