I’m not ADHD (spouse and daughter are) and I’m an extrovert and these people sound like no fun to be around at all! I agree with the other posters, don’t feel like you have to change or feel bad about yourself. Some people simply don’t seem to be able to (or don’t bother- which is worse IMHO) recognize the cues when someone is being extra quiet or uncomfortable. I also prefer smaller groups but I can be boisterous or overly talkative anyway. I have learned to look around me and dial it back when I see people not being comfortable. Honestly, who needs shallow people that don’t think of others? They are missing out on a pleasant relationship with someone who obviously cares.