DAE have no friends?

I'm 30 and have no adult friends. The ones I used to have work so much that they never have anytime to hangout. I'm planning on having a wedding soon and asked a couple of my old friends about it. Without even giving them a date, they said that they were too busy with work and couldn't attend. Several of my other friends have ghosted me. One ghosted me after getting a cushy promotion at their job. One overdosed on cocaine. I feel hopeless and miserable. I'm not suicidal but I passively think about suicide sometimes.

Is this normal?