neglectful

1. ADJ If you describe someone as neglectful, you think they fail to do everything they should do to take care of someone or something properly. 失职的

...neglectful parents. …失职的家长们。

2. ADJ If someone is neglectful of something, they do not give it the attention or consideration that it should be given. 忽视的[oft v-link ADJ 'of' n]

Have I been neglectful of my friend, taking him for granted?

我忽视了我的朋友、没有把他当回事吗？