"爱无能"在英文俚语中通常会表达为 "loveless" 或 "incapable of love"。

He's a loveless person who can't seem to connect with anyone emotionally.

（他是个爱无能的人，似乎无法在情感上与任何人建立联系。）

After a string of failed relationships, she started to think she was incapable of love.

（经过一连串的失败恋爱关系后，她开始认为自己是爱无能的。）

Some people are just born loveless and don't feel the need for romantic connections.

（有些人天生就是爱无能的，不觉得有建立浪漫关系的必要。）

Being loveless doesn't mean you can't have meaningful relationships with others.

（爱无能并不意味着你不能与他人建立有意义的关系。）

He tried to love, but he was just incapable of it and eventually gave up.

（他尝试去爱，但他就是爱无能，最终放弃了。）