Milk Bottle Sweets My Friend Left Out Some Old Milk, And Now I Have A Bottle Of What Looks Like Curds And Whey. Can I Eat It?

My friend left out some old milk, and now I have a bottle of what looks like curds and whey. Can I eat it? - milk bottle sweets

I thought to turn into cheese. I asked myself whether it is safe. Milk was pastuerized, but in our fridge was 4 or 5 months. Now, sitting a few days. It was sealed a few minutes ago, when he became the cover. It smelled very sweet.