Giving him the silent treatment when he pisses you off until he's crying on his knees begging "please baby, don't leave me, just tell me what I did wrong" "I'll be good, I'll be so good for you, just talk to me baby"
During one of you're guyses 'off times', you'll go on dates with 9ther guys because you know Frx is watching from a distance. Most of these guys turn up dead (all of them), and then Dex will show up to your place one day looking super pissed. "Did you have fun on your little date? Hm? Did you get it out of your system?"
Sometimes, during your breaks, you'll find someone to hook up with, fill the void. But mostly it's to give Dex something to fuss over. A couple times he straight up showed up in the middle, breaking into your apartment and scaring the guy away. He'll act like you two are still together and accuse you of cheating. You'll say how you two broke up two weeks ago after he slammed the door too aggressively for your taste. Another time, when hooking up with a rando in a club, Dex just straight up pulled the guy off you and started fighting him.
Using Matt to get to him as well. The first time Matt meets you, you claim to be one of Dexs exs (not necessarily a lie) and say that he's been staking yohever since (also not really a lie). You spend weeks working with Daredevil. He even watches your place for a bit and fights bullseye off from breaking in a few times. Matt does eventually realize you're crazy two, and that this is a fuck up kind of foreplay for you two. His Catholic guilt still occasionally makes him worry for you, but he saw you two have an argument once, and he doesn't want any part of this nonsense.
Dex, constantly pulling trackers and shit and hiding them on you, and in things he gets you. And you, constantly finding them and attaching them to random things to scare him (a random dog, garbage truck, a pigeon one time, that really had him confused for a bit.
His constant need to check in on you, call and text you multiple times a day vs. Your urge to ignore him and watch him unravel.
"You're not wearing that outfit out" "oh I'm sorry, I thought you could fight" 😒