Enid's fear of attachment/loss is much like Carol's, both going about in different ways - Enid running from it and Carol simply hardening up more and more(although showed cracks vs. Morgan). Carol's fear of attachment is also more towards children and Enid's is towards anyone/everyone, being that Carol lost both her daughter and the daughters she adopted.

Those are good plot devices for the characters. I've been enjoying that during some of this bad writing in the last few episodes that I hope they will fix.

Rick's reluctance is different than fear of attachment, it's more rooted in fear of liabilities and the threats that they pose to the people he cares about and he's very attached to them. His fear is losing his group and he very much is not seeing the severe liability Morgan poses due to prior association and attachment to that.

The Morgan issue shows that he has no fear of attachment, to a detriment and then also some of the Alexandrian's have made an attempt to become apart of the group and Rick was too aloof to them, another detriment. But that's also because most of the Alexandrian's have been real liabilities, so Rick's lumped them all one in the same essentially.

And then the fear Dwight and Sherry showed I also wouldn't put that in "fear of attachment". That was "fear of the unknown" and having just come from a hostile group, weren't trusting of Daryl.