I understand completely what ur saying. I’m also 15 and I had the a similar experience where I moved to secondary school 3 years ago and had to settle in and all that stuff but since then it hasn’t been too bad. I also understand what ur saying about the “lack of female interest” as I often feel the same way as I can’t really talk to them. I also have a similar type of stutter where I often get absolutely nothing out but it just flows once I do but I also have the repetitive type at times as well. If u ever want to dm me I’d be more than happy to talk with you