I what I don't understand to love a girl,but can only like love sister or sister that to love her?

I what I don't understand to love a girl,but can only like love sister or sister that to love her?

你可以选择爱我或者不爱我,而我只能选择爱你或者更加爱你

Ofcourse no

我 不懂得如何去爱一个女孩， 或者我只能像疼爱自己的姐姐或者妹妹那样去爱她吧