I had a friend once that never get acknowledge in public about his relationship with his ex.

His ex reason was that she didn't know how to deal with it should the relationship goes public and it went sour and they will eventually break up. A freudian slip of sort that his ex expected to break up with him, hence the refusal to acknowledge the relationship in public eyes.

This after my friend housing her, fetching her to and fro, clean after her, cook after her, and provided the best that he could for close to 5 years.

Hence it's important not to listen to a word a person says but judge them by their actions. As for your case her actions did tell you about what she thinks of you and your relationship, despite of all the sex and things you did for her.

She never acknowledge it because in her mind she never was in a relationship in the first place. Hence at best, she was honest with you that you're both going towards different direction, the dishonest part is that she didn't tell you that from the beginning because that's what her plans all along.

Anyway did both of you spend most of your time together? Because sounds like she already lining up some replacements.

BTW, my friend ex secretly moved out from his house and found a replacement bf 2 weeks in, that despite they're living together LOL.