There are a number of medical conditions that can lead to Crohns-like symptoms and nonspecific inflammation in the colon -- UC, bacterial infection, etc. So there really is no one-size-fits-all test to nail down the Crohns diagnosis with certainty. Granulomas on biopsy says CD, but thta finding is not always present in Crohns. Scattered apthous ulcers are also a strong indicator -- but again, not every CD patient has them. Skip areas point to Crohns, especially as opposed to UC, but they can also show up in other conditions. In most cases a scope, coupled with clinical history (symptoms over time) and biopsies will say Crohns with very high certainty (or not), but this is a very individual disease, with different findings in the same patient over time, so don't be too discouraged that you still don't have a sure answer.
As for family and friends. it's your body, not their . . . and I don't believe that God is sending messages about your medical condition to others.