To see the world through rose-tinted glasses
Describes someone who is overly optimistic and ignores problems or difficulties. Can be said admiringly or critically depending on context.
She always sees the world through rose-tinted glasses, she never sees the problems.
—Doesn't it worry you? —Maybe I do see things through rose-tinted glasses.
Seeing things through rose-tinted glasses isn't bad, as long as you're also realistic.