I (20M) obsessed with 20F in an extreme way

I (20M) have been in contact with this girl (20F) through Instagram for 1.5 years. Never saw her, never listened to her voice and even don't know her name. I used to converse with her rarely too, like once or twice a week, but somehow I ended up being madly obsessed with her, MADLY. I can't stop having thoughts of her. No hour passes but she's in my mind. Up to a point where I get extremely jealous even if I find she talked to a guy or is replying to a comment of a man even though no one knows that account has a female admin. This happened maybe because of the qualities in her, and I didn't see this whole thing coming; otherwise, I might've controlled myself.

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I know her through her honesty, her extraordinary knowledge, her immensely pure charector (lol this is what she spells), her aesthetics, her īmān, her precise way of speaking, and her choice of words. I notice much detail about her; the way she takes small pauses during the conversation is so soothing. She's so genuine she'd rather go silent or skip the topic than lie or deceive. When her chat or account is opened (messages, posts, reposts, etc.), EVERY PIXEL I receive through her means appears to be blessed and prosperous.

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Two days ago my Instagram was banned, and I have not submitted the appeal yet because my mental health was getting SEVERELY worse thinking about her, checking her empty profile, going through her reposts multiple times a day wondering for whom this repost could be, and burning my head with overthinking. Although I confirmed with her if she likes someone and she refused, still, I always have this thought while exploring her reposts: she can't lie, never. So I know the outcomes of getting back to Instagram. I'll end up deteriorating my mental health more than now. I told her about this obsession and how I have no control over it, and she, being the most genuine girl, told me, "It's fine."

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I've had her vision 3 times in the past week. I just woke up on my bed writing this. This time I saw she contacted me on Reddit somehow and on WhatsApp, cussing me out for something. Earlier I was contacted on Instagram. I've even had a vision of her face in my dream. Strange, yeah? Because our brain can't create faces, but I've seen her in a pitch-black hijab, round glasses resting on her nose. Anyways, the dream thing is extremely horrifying. I was already coping with the overthinking and "constant thoughts" part, but I can't bear this. That too on a DAILY BASIS? FYI, I've had a not-so-good childhood and was struck by afflictions in every part of my life; no month entered into my life, but I know what happened in this month in this particular year, but I was NEVER HAUNTED by any of it. But this girl... she has been affecting my mental health in a strange way.

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May Allāh ʿazzawajal preserve her. She seems not from this world.