How do you deal with a partner who focuses more on your flaws than your strengths?

She doesn't reach out like before, doesn't call, doesn't text, suddenly busy and now she has withdrew words like babe, or I love you. That means she's done, right? And today is her birthday, still expecting something from me, what should I do?
What are some examples of people turning to friends as their primary source of stability, companionship, and care?