I wouldn't feel happy if you didn't go shopping with me.
如果你不和我一起去购物，我会不高兴的。
I wouldn't feel happy if you went travel alone without telling me.
如果你一个人去旅行而没有告诉我，我会不高兴的。
I wouldn't feel happy if you didn't come to my wedding ceremony.
如果你不来参加我的婚礼我会不高兴的。