Okay let me give some context.

This is going to be a little cringe for you guys but atleast i got a little experience out of this. We saw each other at a school party and spoke few words, suddenly she left (i wanted to talk to her more) and i did not even know her name, so the cringy part is that i asked one of her classmates, who is she and decided that IT WOULD BE A GOOD IDEA TO ADD HER ON FACEBOOK...

To my surprise she was pretty cool about it although she threw a few punches in. After that i just asked that we should go out and talk. She denied me and wrote why she couldn't go and offered a day when she could. So today was the day we met and talked about ~30-40 min(it was late and she wrote me before that she couldn't stay for that long). I said we should do it again but she said shes working that day and did not offer a counter day, so should i push it and ask for another one? Actually feeling like she was just being nice and went out with me.

I have a problem detecting if a girl is genuinely interested or just being nice. I am person who literally hates forcing myself on people. Could anyone point general tips how to know if shes just being nice?

Thanks