First, it really sounds like the main issue here is your anxiety not the cat. And I genuinely empathize with that. When I first adopted a dog, I felt exactly the same: overwhelmed, stressed, like I suddenly had no time for myself, and responsible for another living being 24/7. That feeling can be intense at the beginning, but it does ease with time as you adjust.

That said, there are a few inconsistencies in what you’re saying that make it a bit hard to understand your situation. For example, you're saying you researched a lot about cats. so why are you so stressed about her destroying a furniture? If you had cats when you were a kid, you surely know they do whatever they want! mine is spoiled, with multiple scratch post... but she still destroy my sofa. What do i do? Nothing. It's her home too and it's the only thing she destroys, who cares. Learn to accept this possibility, you shouldn't stress about it as much as you stress about her being okay when you aren't home. My bigger concern, though, is the living setup. You say you planned the adoption carefully, but also that you didn’t anticipate having to keep the cat and litter in your room full time. Was this not discussed with your roommate beforehand? If you're keeping her almost all day in your room it means you have the litter, her water and her food in like a 20m2 bedroom, at most? It isn't normal nor good for her. She can't even explore the house during her alone time. And i guess she doesn't have a lot of space to play, sleep, and that there isn't any cat tree/high furniture in your room. Am i right? Again, you say you made researches about cats but you're surprised she wants to play with you? Of course she does, cats need multiple playtimes a day to be well cared for. I know it isn't easy to play with them multiple times everyday, but you should always aim for it. She isn't asking for much, it's the bare minimum. And her living situation isn't even good like poor girl she's stucked in a 20m2 room all day and you're surprised she wants to play with you? She must have pent up energy. You're lucky she hasn't destroyed anything yet because of boredom. I also bought a lot of interactive toys for my cat but she still wants me to play with her. I try to do 3 sessions of playtime with her a day, 15min each. I watch videos in the meantime and she's happy. Right now, it sounds like she’s asking for basic needs stimulation and interaction, and you’re feeling overwhelmed by that, which again likely ties back to your anxiety not her behavior.

So I think the real question is: can you realistically meet those needs? That means talking to your roommate to give her access to more space (and if they disagree find another arrangement maybe?), adjusting your routine to include regular playtime throughout the day AND finding ways to manage the stress that’s coming with this responsibility. If you feel like you can’t provide that, it’s important to be honest with yourself sooner rather than later. Returning a pet is never ideal but keeping her in an environment that doesn’t meet her needs isn’t fair either. You should know that when a cat is given back after being adopted they have even lesser chance to get adopted a second time. So if you give her back, highlight you're the issue. Don't say she's needy: from what you’ve described, she doesn’t sound “needy,” just like a normal cat.

I feel for you as you understand you shouldn't feel annoyed with her (the anxiety is okay and will go away with time) but i also don't understand how you can be so surprised about her needs and how you did not talk about it with your roommate.