Why can't this fool leave me alone

Sorry if this isn't allowed here, I did in fact read the rules and BEC is my new favorite phrase.

I've been broken up with my Sad Person Ex for about a week but we're still living together and it...blows.

It's my friggin bday next week and I know I'm still gonna be stuck here since that good-ole-just-above-minimum hourly wage isn't helping me get out as fast as I would like.

Sad Person isn't actually sad, and has had the nerve to be constantly going out for fun times with "friends" every night after work, but when I'm off and home they just hide in their room and watch TV loudly. BEC?! Am new to this.

It just feels like every thing they do is meant to hurt with me or screw with me in some way so I'm staying mad and remembering why I left their sorry ass. But, does not feel good.

Don't wanna be mad all the time and don't wanna be mad on my GD bday. I just, have some friends I can maybe stay with? Maybe? But I really don't want to couch surf (lived that life many years ago) cuz it's not easy to do with work.

Sad Person also keeps buying weird shit that I think I'm supposed to eat/use/deal with but we're not really taking and I don't want to talk so, like, what to do?! Eat it and use them for every dime they're willing to give since I put up with their abuse for 1.5 friggin years, (def not) talk to them about what I'm supposed to do with it, just leave it be?!

This is just tip of the iceberg stuff but it just goes to show that everything is mind games and it's ALREADY getting old. Idfk.

Thanks for listening to my vent and any tips for living with someone who will not just let you live your life are much appreciated. I can go the passive-aggressive route, do not get me wrong, but do I have the energy?! I DO NOT KNOW.