If a girl gives no counter-offer or alternate date, is it safe to assume no to low interest?

Background. We met through mutual friends. Started seeing each other more at casual group meets. Flirted. Built up rapport. Eventually I got her number and we started texting.

Eventually. I asked her out and she agreed. I thought it went well. Good vibes.

Soon enough I asked her out again. That weekend she wasn't around. She offered no alternate time.

Next, I followed up again and asked her out on a Friday. Oddly enough later that day out mutual friend invites us out for her birthday that same Friday. The girl gets back to me saying she can't due to said party. Again, she offers no alternate time.

At this point, I'm just going to assume low interest and move on. I'll stop contacting her and won't bring up another meet up again. Granted I'll see her at the party and talk to her but leaving it at that. I'm leaving the ball on her court.

Oh well. I thought I had a green light. I must've read wrong.

Thanks.
If a girl gives no counter-offer or alternate date, is it safe to assume no to low interest?
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