I know a little how you feel. I have no friends, and am uncomfortable around my own family. I find refuge in things as well like art and music. I know how you feel about exploding. But don't think of yourself as weak. I use to think of myself as weak for not being able to commit suicide, but now I realize two things. The first being that I am in fact strong, because staying alive takes more strength then killing yourself ever could. Two, I don't really want to die. As much as I have said that in the past I don't want to kill myself...I just want to find a reason to live life. Sometimes I wonder if that isn't what life is all about, just trying to find a reason to live it.
Have you considered talking more to your wife about how you feel. And I don't mean talking to her about your wishes for a short life, but talk to her instead about some of the reasons you wish for a short life. If not her, maybe talking to a therapist would help. No harm in trying, when you wish for death, you really have nothing to lose by at least trying. Also, have you considered the thought that maybe it is clinical depression and/or social anxiety? Both of these problems can be fixed with medication and a little hope and help. Maybe you should talk to your doctor about some of your options. I wish you the best of luck.