Is it just not the same anymore? Then there must have been a change. The noun change can refer to anything or state that is different from what it once was.
Change is everywhere in life — and in English. The word has numerous senses, both as a noun and verb, and is a part of many common phrases, like “a change of heart.” Change might describe a drastic transformation, as in Kafka’s The Metamorphosis, or it could also represent what’s jingling in your pocket.