(((((((insecurity)))))))))))))

I'm sorry your husband thinks that way. Unfortunately its not as easy as 'just stopping'. It's an addiction, and it's hard to stop because it is used as a coping mechanism. Has your husband read any books on self-injury, or are you in counselling? Either of those might be a good start to having him understand what's going on with you, and for you to get to the root of why you self-injure.

People who see us from the outside don't understand the behaviour, but you've found some people who understand here.

No, you're not selfish.

Hope that helps some. Be easy on yourself.