Chat After 1st Meeting

Hi Guys,

I am Chatting with a girl after our first meeting.

.

Meeting was good .We agreed to exchange numbers and were asked to take a decision after getting to know each other.

Girl looked interested in first meet as per me.

But now totally opposite from the day we met, out chat is going all questions and answers.( From Day 1 itself)

Seems to me, she is not interested at all , which i have made peace with.Just that the behavior change has surprised me.

Any sort of pressure and willingness to go forward was asked in the first meeting.

What should I do?

There is no point in taking this forward, How do i end this nicely since families are connected.

OR Am i thinking fast ( We are 4-5 days in chatting)