“难相处的”可以用英语表达为 difficult to get along with、hard to deal with 或 unapproachable（侧重指因态度高冷等让人难以接近相处），具体使用可根据语境选择：
difficult to get along with：最常用，强调与人相处困难，关系难以融洽。
例句：He's a difficult person to get along with because he's always so critical.（他是个难相处的人，因为他总是爱挑刺。）
hard to deal with：更侧重于描述处理某个人或某种情况时具有挑战性，也可表达“难相处”之意。
例句：My new boss is really hard to deal with; he's always changing his mind.（我的新老板真的很难相处，他总是变卦。）
unapproachable：侧重指人态度高冷、拒人千里之外，导致难以接近和相处。
例句：She seemed unapproachable at first, but once you got to know her, she was very friendly.（她一开始看起来很难相处，但一旦你了解了她，就会发现她其实很友好。）