So I went on a date with this girl (we texted a bit couple of days before that), was fun but I was sloppy, didn't k-close or set up a next meet, just because I didn't feel I made her comfortable enough for that. She comes off as a very confident so I am pretty sure she knows what she wants. So during next few days I texted her a bit each day with random chit chat, usually rather late so she wouldn't reply on last messages because she turned off sound and went to sleep (she also wouldn't continue convo next day if she saw message).
So, last night same thing, she said he is going out with a friend etc etc, and I asked her:
"Did you go to XYZ this week?" (X is some book fair thats going on SPAM)
and she replies
"Nope, planning to go this weekend. You?"
I say:
"Neither did I, but I'm planning to go with you xD"
It didn't sound so stupid after I had couple of beers. I got no response ofcourse.

I like her and surely would want to see her again, but not sure how to proceed. Am I coming off too needy with all this regular texting? Should I just stop with all that and just text her after couple of days to join me on some fun activity?

Yes it did seem like too much texting after the date for a girl you haven't kissed yet. However I thought your text reply "I'm going with you" was damn near perfect. I'm surprised she didn't reply with 'really now' or whatever. Next time you text her, come with a great mood, forget the festival texts ever happened & then invite her out. Kino escalate her & kiss close etc. on the date.