Questions: Family & Friends

So, my online friend and I have known each other for 8 months. We used to be very close, chat a lot, watch films together. But now, she always takes a long time to reply (like 2-3 days). It has become REALLY annoying. It's basically a pattern now. She apologized on her own a few days ago for being inactive (she said that she didn't feel so good these past days) even though I hadn't asked her if she was ok, etc. I appreciated her initiative, and she even started talking about a tv show that we both watch. Great. I replied as soon as I woke up... no reply. She hasn't read it yet, and it's been 2 days now. Yesterday, I double texted her and said that I'm here for her if she needs to talk and that I miss chatting/watching films with her, etc and that she is a good friend). I understand that she has a life, etc, and that she can't receive push notifications on the website that we use to chat... but COME ON! She used to reply at least once a day... I'm sick of being taken for granted. I guess I'll just disappear from the website for a few days... maybe a few weeks? She double texted me (like 9 days ago) because it took me half a day to reply. So, I'll see how she reacts when she sees that I don't reply within 5 days or so. I'm sick of seeing her being online on her social medias all the time (we follow each other on our personal accounts). I'm doing this because I wanna see how much she really cares and how much she values our friendship. Maybe she'll realize that she doesn't wanna lose me after all (especially after reading my text from yesterday).