Only child and marriage

I don’t know if this is the right place to ask this question, but I hope I get help. I am a (27F) and I’m my parents only child. I’m very attached to my parents, we do everything together, literally everything. I think I’m being proposed to this year, and it hit me very hard yesterday to the point where I’ve been crying since then. I know that it is sunat alhayat and that Allah said it is part of his sunnah, I’m not afraid of marriage, I’m afraid of leaving my parents, I’m afraid of leaving them alone. We’re going to be living in the same area, but my heart breaks me so much for leaving them. I always worry about them, I always take my mom out and we run errands together. I’m still not proposed to and I’ve been bawling my eyes out barely sleeping at night at the thought of leaving the house. I know that it is every girls dream to get married to the love of her life, but I just can’t shake the fact that I’m going to have to take this huge step.