你可以说："I really enjoy spending time with him/her."
这是一个比较常见的表达方式。其中，"enjoy" 是动词，意思是"享受"； "spending time with" 是短语，意思是"和某人在一起"。
例句：
I really enjoy spending time with my family. (我非常喜欢和家人在一起。)
I really enjoy spending time with my friends. (我非常喜欢和朋友们在一起。)
I really enjoy spending time with my partner. (我非常喜欢和我的伴侣在一起。)