1.  In some situation, love can make one feel break heart.

2.  Even they break our hearts, we can't let them leave us.

3.  She chooses to marry Edgar Linton after a long time's consideration, which breaks Heathcliff's heart.

4.  It was about a boy who should have had more, but I didn't realise it at that time and I said something bad, which broke his heart.