He told NME that Winehouse, who died last July, “would have wanted me at the funeral”.
The singer-songwriter said: “It’s a personal feeling of grief I’ve never had the chance to see through.”
Doherty is well-known for his alcohol and drug-fuelled lifestyle, as was Winehouse.
“When Amy died I was sat in a room, a matchbox room in Camden Town, not able to leave, basically wallowing in my own filth. Literally knee-deep in shit,” he said.
“I couldn’t speak, I couldn’t see anyone, I couldn’t pick up the guitar and when I did pick up the guitar it was woeful ballads about how Amy wouldn’t be coming round tonight, it wasn’t a very inspiring time”.
The Libertines reunited in 2010 for a series of gigs but have since gone their separate ways, with Doherty now living in Paris.