SUBREDDIT: r/dating_advice
TITLE: I [M,20], got this girl's[20] number but i'm not sure where to go with this...
POST: So here's the story:

I was smoking some weed with some buddies in a parking lot in my town when I see these two other girls doing the same thing a couple spaces near us.(This area is easy to get away with smoking in so yeah...)

I think in my head..."i should invite them to match with us." So I call out the offer to them. They accept and they enter my car. We had a casual conversation nothing too special. Then as they are leaving and getting in their car I call out to one of the girls. "Hey can I have your number?"

She said yes and gave it to me. I then texted her my name. At this point I completely forgot her name. All I know about her is that

1. She has bright red hair.
2. She goes to the same college as me.
3. She lives in the same city/town as me.
4. She goes to the same smoking spot every so often. Whenever is convenient for her I guess.

She never texted me back or anything. I wait two days and then text her to ask if she is busy....no response. So 5 hours later I decide to just give her a call. Phone rings...and she picks up. 

Girl: Hello?

Me: Hey uh...do you remember me...?

Girl: Yeah but i'm working right now.

Guy: Oh ok cya then.

Kept it short and sweet. So now I dunno what to do...I don't wanna be texting her too much or anything but at the same time I would like to meet with her again and maybe get to know her a little better. She gave me her number and everything but you'd think that if she had any interest she'd text or call me or something....
TL;DR: 
I got this girl's number and want to be able to arrange a meet up with her in a successful way. I wanna make sure i'm not bothering her in the process because it seems like she might be a busy person.