Does she like me if she dresses up for our first date

She put in effort because she wanted to show up well. That's respect for the date and for you. It doesn't mean she's already decided you're the one. What it does mean is she's removed a barrier. She's not testing you or playing it cool. She's given you a better version of her to work with.

Pay attention to how she acts once she sits down. Does she maintain eye contact? Is she asking questions? Is she laughing? Those are the signals that matter more than the outfit. Dressing up opens the door. What happens in the next hour decides whether she walks through it again.

The mistake is turning her effort into a moment where she needs to accept a compliment. That flips the interaction. Instead, let her see that you noticed by being more engaged than you would have been otherwise. Ask a real question about something she mentioned before the date. Order food with intention instead of fumbling. Make eye contact. Sit a little closer if the setting allows it.

If you do mention something about the date itself, keep it brief and move on. A simple 'You look great' works. Then immediately transition to the conversation. She doesn't need you to perform amazement. She needs you to match her investment by being fully there.

During the date, you don't get points for acknowledging that she dressed up. You get points by making her glad she did. That means being interesting, asking follow-up questions, and showing her you're someone worth the effort.

After the date ends, text her the same day. Wait a few hours if it was evening, but send something before midnight. Reference something specific from the conversation, not from her appearance. This tells her that the date landed, that you were paying attention to her, and that you want it to happen again. If she doesn't respond within 24 hours, send one more message 3 days later. After that, stop. She's either interested or she's not.