What should I do if I fall for my unemployed childhood friend living next door?

The Reason the Female Lead Hates Dong-min Episode 2

Chagall..
Dongmin:?
Female Lead: Damn it..
Dongmin: Do I have to see that shitty Son Yeo-ju here too?
Yeoju: That's what I should be saying.
Dongmin: Haha, then is that a good thing?
Yeoju: Why.
Dongmin: Ah... you look like you really hate it.
Female Lead: Of course
The reason I dislike Dongmin?
First of all... when I was in elementary school...
Female Lead: Yahan Dongmin
Dongmin: No, don't call me that (pant)...
Female Lead: Yadongmin.
Dongmin:...?
Yeoju: Do you want to come to my house after work?
Dongmin: Right!
- Yeoju's house
Dongmin: Whoa!? (Pant) So cute! Can I feed the fish? (Pant)
Yeoju: Yeah, I just went to the restroom.
Dongmin: Oh
-I'm back
Female Lead: Ah Han Dong-min~
Dongmin: Yeoju... (pant) The fish isn't moving (pant)
Yeoju:?.. Hey
Dongmin: Why?
Female Lead: N-No, that's not dog food, that's dog poop!
Dongmin:? Then why did you put it in the food bowl...
Yeoju: Ugh, then you didn't even check the expiration date... Damn, this was yesterday
It's expired!
Dongmin: Sorry...
Yeoju: No, I told you Donghyun gave this to me.
Dongmin: Sorry...
And from when the female protagonist was in middle school and joined the dance club
I've had a crush on you for two years.
Female Lead: So. What is the reason it's good?
Taesan: Because I can drink with you?