Your boss used to be friendly and pay attention to you. Now she avoids you.
She chats breezily with your colleagues but blows you off.
She takes FOREVER to return emails when she used to do it within the hour.
She plays "hard to get." For example, you send her a meeting request and she she doesn't attend, even though she's free.
There's a meeting that you should have been invited to. You weren't.
You're repeatedly overlooked for high-profile assignments that you feel capable of handling.
She gives you production-oriented tasks instead of strategic projects.
Suddenly your work gets reassigned.
You're left off of email announcements congratulating teams on projects, when you also participated on those teams.