Like u/Steelspy said, this sounds like you're experiencing depression. Of course stuttering can effect depression greatly. At the end of the day though, your outlook on life depends on how you see it. Getting to a good place in life may be hard, but it can be easier with therapy and other coping mechanisms. Regardless what you're faced with, as a stutterer you've most likely had a rough start to life, but you're not alone. You got this.