Your family does not accept your relationship with your boyfriend, Mattheo, because he is not from the same social class as you and they consider him a mudblood because one of his parents is a Muggle. During the Magic War you must choose between your family or your boyfriend

"If I betray you, I betray myself... If I betray my brother, I betray my family... My family is very dear to me." you said helplessly, you looked away

"Dearer than me?" Mattheo said, holding your chin, making you turn to look at him

"No... no, not dearer than you." you smiled at him