If she calls, let it go to voicemail. If she texts or emails you a happy birthday message, simply say thank you. Fin.

M: 40 W: 37
T: 20 MR: 13
S13, S9, S4
BD: 1/29/18
Sep: 4/23/18 (I moved out)
8/24/18 I come home, she moves out

If you want to get out of the hole, drop the shovel.