I understand how you feel, my stutter bothered me upto the age of 18(20 now). and just like you, i was depressed most of the time and somewhat sucidal. an d tbh, i don't remember what got me through it, but i had a supportive boyfriend then. and at times humour helped me go through it like me and siblings and close friends always laugh about it when i was trying soooo hard to make sentences also it depends what environment you are in, i have realised that civilised people are way more accepting and will give you time to voice yourself, most of the time I tell someone i am talking to, "sorry i might stutter" or anything of that line and it goes well