The advice I’ll give you is the advice I would give anyone who has something “unsexy” about them that’s dragging their confidence down. Try to find the things about yourself that you do find sexy. Then play those things up. Assure yourself of the good things you have going for you. Stutter specific advice: be upfront about the stutter, save yourself the misunderstanding. Also remember that your personality can show through much more than words. Like your facial expressions, mannerisms, sense of style.