Is this gonna be worth it?

Now,
Here is a short story. I met a girl one day and we did hangout for a while and at first it seems like she is interested in me since she wanna be close and sit next to me.
Well, she didn't used to text me much. She used to give short replies but once she did ask me if I came to class or not. And asking about exam prep.
But that was the last chat we had.
On the second day,
I became quiet since she didn't used to talk much like the first time we met and I wanted to see if she is geniunely interested in my life.
So I did my work, and she usually brought her table very close to my table and sat. And sometimes glacing at what I am doing. Sometimes looking at my book.
So I still be quiet, and when she was leaving she didn't wish me a bye.
.
Now I am sitting here all day trying to find a conclusion that whether I invest my time on her to see where it leads. Or just walk on my path.
Is this gonna be worth it?
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