Well said @Mandiesue Sometimes parents are what they are, and as I said, older people can be very set in their ways. Mental illness may have absolutely nothing in the world whatsoever to do with it. I wish I had known what I know now 30 years ago. We want everyone to be totally supportive and completely happy for us on what is definitely one of the biggest steps you'll ever take in your life. But it just doesn't happen. Yes - it's painful. My in laws decided they didn't want to go to Jamaica with us for our wedding when everyone else cancelled and I was totally ticked off. They were worried about the cost when the group rate was cancelled, but we ended up paying $300 less each with our booking so to me, no excuses. But it is what it is ladies. You can't change it. Our natural need to find reasons and fix things isn't always satisfied. Sometimes there is no reason and no fix. You do what you can and move on.
In the end, it's the two of you that count, and marrying each other in a wonderful tropical place, not matter who is there and who isn't.