Is losing 65lbs in six month good?

Yes, if it's part of an intentional plan to do so.
That's at the higher end of the scale and is supposed to be a rate which allows your body to better handle the changing amounts of skin (so you are less likely to look like the "biggest loser" people who need "plastic" surgery to remove huge bits of loose skin).

If it happens UNintentionally...NO.

1-2 lbs a week is a healthy amount

It's too much and it can lead to other health issues.
Losing weight should ideally be gradual.

I wish I could comment more, but that seems a lot and maybe an unhealthy goal?

If you were overweight and needed to lose that much it is good, but it does seem a lot.

it's great progress. Congratz. hope you become the version of you that you want to be :D

Losing weight the healthy way seems fun

not just good, stunning. Wish I could manage that

I wish I could lose 25kg