Aishu still didn't reply to my message in which I asked her out. How much more should I wait?

As you all know Aishu was my close friend when we were in elementary school in 2008-2011. Now she is 21 turning 22 after 3 months and I am 22 now. I finally asked her out for coffee via Instagram on 6th May 2023 but she still didn’t even see or reply to the message yet. She did say before that she isn't that active on Instagram so she goes weeks without replying to my messages. But i think she is genuinely not active there as she didn't like my posts and doesn't view my Instagram stories. I got rejected by 3 girls very recently and honestly hoping a positive reply from Aishu but idk how long I have to wait. What do you think? Should I keep waiting?