I ruined my relationship with my best friend. What do I do now?

So, I recently confronted my friend who lied about her birthday. (REFER TO PREVIOUS QUESTIONS) and we are no longer speaking. I had apologized to her and said we should move on from it the day of the argument. No response. I've tried to just talk to her about casual things and she won't respond. It's been almost a week. Even if I just say hey or hi, she'll open my snap and then ignore it. I'm just getting really depressed and I think I ruined my friendship with her. I’m really depressed, and if she wants to end the friendship, that’s fine, I just want closure. Things like this make it hard for me to let people in and make new friends. What should I do?