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).

Should I text this to my friend? So my friend has been acting a bit distant lately (takes a long time to reply, like 1, 2 or 3 days, she even left me on read once, etc). She apologized on her own for being inactive and not feeling good as well (well I think that's what she meant). I'm glad that she took this initiative (I hadn't double texted her nor asked her why she wasn't replying, but well, it basically took her 3 days to reply to my previous text). She still hasn't read my reply, though (which I sent as soon as I woke up, so a few hours later). It's been a day already (well 23 hours, but still). Now, I am thinking of sending her this text (maybe tonight):

"Hey (name), I hope that you are doing well! I don't know what you're going through but as I said yesterday, I am here if you need someone to talk to. You're a good friend, and I understand if you need space. Anyway, I'm looking forward to chatting and/or watching films again! Take care, (name) 😉"

So my online friend has been acting distant lately. Left me on read on Wednesday (though my message didn't really require a response tbh), then I sent another text on Thursday (about something unrelated). She replied on Friday, said that she had been busy lately (preparing stuff for the weekend because she was apparently going to some events). OK, fine. I reply to her on Friday, she replies exactly 24 hours later on Saturday. On Saturday, I reply again, then send another message (invitation to spend time together because we haven't done it in a few weeks). Still no response after 2 days. I told myself: "She'll not hear from me again 'till she texts me".

She texts me on the 3rd day and says "Hey! I'm sorry, I haven't been feeling really good lately" (she didn't word it like that, but I guess that's pretty much what it meant). Then, she says that she hopes I'm feeling good and she asks me what I thought of the latest episode of the tv show that we both watch. She texted this very early in the morning, so I replied like 3 hours later (when I woke up). She still hasn't replied. But, we text on a website that doesn't send push notifications, so that might explain why she hasn't replied yet. But I don't want to check if she has read it (or else she'll see that I was active not long ago and probably believe that I'm obsessing over if she has read it or not). Saying this because she knows that I pretty much only chat with her on that website. I just don't understand, she literally apologized this morning for being inactive and now she's back at it again.

Anyway, now, my question is (please vote in the poll): should I stop texting her first and not double text as well (even if she might actually not be feeling all that good at the moment)? And should I ask her if she wishes to keep contact with me (could explain that I'm feeling a distance in the friendship)?