My husband is saying some other woman is "very special" to him?

I posted a few weeks ago about finding messages in my husband's phone after noticing him constantly on his phone. I confronted him lightly without him realizing what I actually know to test the waters of how far he'd lie. He essentially admitted who he was talking to and said that his childhood friend is "very special to me" and that he would never stop caring for her and never stop trying to speak to her but at the moment she has him blocked and he feels "devastated". I asked why she blocked him and he won't tell me. Said this is between him and her and their "special childhood connection". I personally think having another woman he isn't related to be "very special" to my husband is a violation of the marriage. Can anyone think of a circumstance whereby this is appropriate? WTF does "very special to me" even mean? Obviously you can care about people but describing it that way seems like something more than friendship even if it's not physical. I am 100% positive he has never slept with this person FYI.

My husband is saying some other woman is "very special" to him?
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