What does it mean when a girl says she's bad at texting?

There's this girl I met at school and we have some mutual friends so we see each other and talk a bit at parties and stuff most weekends. We exchanged numbers but we only text occasionally because she doesn't initiate conversations at all but she's really friendly when I see her in person. Anyway, she told me she wants to get dinner with me one day this week so I said I don't really have any set plans so she can text me when she wants to get dinner and she said we should definitely get dinner this week but she's not a good texter. Do you think she doesn't like texting or is she just not actually interested in hanging out? by the way she's really hot so I doubt she wants to date me or anything like that but she's funny and sweet too so I'd be okay with just being friends
What does it mean when a girl says she's bad at texting?
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