I mean because of DP I had to drop out of high school and spent the majority of the past few years in and out of various psychiatrists barely leaving my house except for a few attempts at working.. so yeah, I consider it a mental illness. I've known people over the years for have killed themselves over this. Its not the the properly working defense mechanism of dissociation working, this is an abnormality.. a dysfunction.
"A mental disorder, also called a mental illness or psychiatric disorder, is a behavioral or mental pattern that causes significant distress or impairment of personal functioning."
I get where you guys are coming, but this is hands down probably the worst thing I will ever experience mentally.