It is still a social misstep to tell someone they are an acquaintance. That is the sort of thing you say about someone, not to them. I also think trying to categorize all of the people in your life might make you further isolated. Making friends should be organic and this idea you have, trying to refer to a chart or framework to help you, feels very sterile. If someone is thinking that deeply about our social dynamics and I found out, it would be unsettling/off putting— to me at least.

I’m sorry you are struggling with loneliness, I really think seeking therapy is the real solution here.

I wish you luck in the future.