My boss texts my partner to ask me to cover other peoples’ shifts rather than texting me.

For context, my partner is a department head like my boss. Ever since she became a department head, he will only text her about me coming in early to cover other people. He has my number. We have called each other before. But now he doesn’t even directly ask me, but sends it to my gf. I guess because I’m below them? I don’t know but it feels incredibly belittling.