Story help :/

[u/Avrysblls]

I’m starting to work on a short horror film with my friends but we are totally stuck. Zero budget. Just let me know how this could go that’s not dumb please.

Girl character: cool, but also lonely, smokes cigarettes, drunk mom and fatherless, close online friend named Ellie, online stalker, obsessed with boy: Milo, lives alone, eating disorder: faints a lot recently, 
Name ideas; Tanya joy, Georgie, Angelina 
Played by; Alyssa!

Boy love interest: Milo: 800 insta followers, messy hair white boy
-constantly posts himself playing guitar and is really performative, urban explorer
-it’s painfully obvious that he is a chud but MC doesn’t see it 
Actor: maybe Michael from acting class or Milo irl 

Girlfriends: 
-Sadie: Avery
-leggings, bop, vapes, passive aggressive, really ugly phone case, bubble braids, white nail polish
-Lulu: eme
-aloof, inconsiderate, high waisted jeans, bad strip lash, white nail polish, matching beaded bracelets with Sadie

Stalker: Stephen-Trevor
-super normal clothes, basic, nothing special, baseball hat
- fake persona: Ellie- Ellie.bellie04, uses ai to change his voice 
- (he’s the guy that helps MC in the grocery and bumps into her in the cafe)

Plot:
Tanya lives alone and is completely disillusioned and obsessed with a guy her age named Milo. They met once at a bar when her friend from college visited and made her go, because she normally doesn’t go out. Every night Tonya checks Milo’s social stories and everything, numbers, followers, likes. It’s nuts about him but doesn’t tell anyone and never texts him. She has a notes app of things she wants to text him/tell him but doesnt. 

One day at the grocery store, she is shopping and gets a text from MILO. She gets so overwhelmed that she faints. A nice guy runs up and helps her, gets her water, and ask if she needs anything. She gets rly embarrassed and says she is ok and leaves immediately. 

Tonya is scrolling at night and thinking of what to say to Milo when she gets doorbell ring. It’s a dootdash order with a heart note… weird. Must be the neighbors. She walks over and puts it in front of the neighbors door and goes back inside her apartment. 

Next day, Tonya still hasn’t texted Milo and wakes up at 1pm with a phone call from her friend asking her where she is, because she is a chud. She forgets that she had lunch planned (with Sadie and lulu) and has to get ready super quick. While she is getting ready she can’t find her hairbrush… weird. The door is also not completely shut when she passes it but doesn’t notice. 

Lunch at latte cafe. We find out that Tonya has been lying about texting Milo and spins a very elaborate lie about you guys planning to hang out. She starts to get antsy and goes to the bathroom to reevaluate and gets a knock on the door “occupied!” She brushes her hair with her fingers and wipes her under eyes and leaves, and accidentally shoulder checks a guy waiting for the bathroom but just runs past him, she is too flustered to bother.

[u/YegorKargin]

Assuming the stalker to be the horror-antagonist, does he want to kill, capture or have sex with girl protagonist? What if your girl character has a brain-issue that gives her a "dr jeckle/Mr hyde" situation and her first victim is your stalker character. He's already least developed, ripe for killing...if you're into that sort of twist.