Guns that are hard to kill yourself with

I have suffered from suicidal ideation in the past. It has been years, but always the urge only lasted for a few minutes, and it is imperative during those few minutes that I not have a quick method of ending my life. I've always been afraid of owning a gun because of this. Are there gun options that are basically impossible for me to shoot myself with? Not sure if it matters but I'm 5'6", fully mobile, etc. I do live with my wife who can emotionally support me, but I don't want her to be the only thing keeping me from offing myself in a dark moment. That just seems like a really unfair amount of responsibility for her.