we've been dating for a month

i asked her out over text ( i usually do and works) "im going to blablah.. if u wanna come maybe ill pick u up on the way

She hasn't replied back in 1 day whats wrong?

Do i text her again? and what do i say?

I would just give her some space, and after 2 days i would just text her a normal text...don't even mention the fact that you asked her out. Just talk normally to her and DON'T push too much
Good luck!

What really work for me is giving them little choice, for example "You know what? I'm going to pick you up in 5 minutes and were going to go enjoy ourselves.'' The next thing i know she getting into my car and were off. Some women like men who don't play games.

You've been dating for a month, but how often do you two talk? Or better put, how often do you go without speaking? I'm assuming daily since you're wondering why you haven't gotten a reply in that time.

Give it another day. If you still haven't heard from her, try calling her just to catch up. If she answers, don't bring up the fact that she didn't reply to your invitation, and you'll probably be able to gauge if her interest level has waned based on her tone, etc. If she seems weird or different, or if she doesn't answer and doesn't return your call, move on without any further contact.