Mom cut me off because of boyfriend

My mom dislikes my bf for many reasons.. she basically told me I have till next November to move out because of him this hurts me a lot, I’ve decided to move out and get an apt with him I haven’t told her anything but It’s already set for the 1st of next month as much as I would like to stay at home with her I just can’t with her actions, she’s been doing stuff that hurts me a lot for example her birthday was yesterday and she invited my sister & her bf out for dinner, she straight up ignores me when I’m around her.. its been almost 2 weeks and we haven’t spoken to each other

What do I do?