TIFU by asking a girl out

So, to give some backstory. I met a girl at my place of work, we got on well and worked well together. Every time we were on a close shift together we wouldn't stop talking to each other. We actually got told off one time because we wouldn't stop talking and kept missing things as we were tidying up the store.

But, anyway she eventually left the job to start Uni, which afterwards we kept in contact. I always made an effort to try and talk, but she was always a bit late to respond, which I always chalked up to being busy with coursework or just getting to know her flat mates. Here's where I think I fucked up, I asked her when she was coming back to where we both live (we both are from/live in the same town). She said end of December to end of January, so I just asked: "So, I was thinking would you want to meet up and do something when you're back?" (Verbatim) Asking if she wanted to watch a film or something along those lines, I know she's really into films, so I thought that would be a nice thing to do. She's seen it and is yet to reply, I'm thinking either, she's busy and doesn't have the time to respond. Or I've fucked up and she just isn't into me like that. Honestly I feel like shit, as I actually quite liked her.

(I do have to add, both of us are pretty shit at texting, which we both made clear to each other on her last day as we exchanged info)

TL;DR: I asked someone who I used to work with out and now isn't responding