Situational Stutter

Situational Stutter I'm a 16 year old ( soon 17 ) and I have this weird situational stutter, it's basically like when I'm with my friends I talk very fluently and very rarely stutter, but as soon as I'm talking to my family members or someone who knows I stutter alot, I just start stuttering alot. This also doesn't happen when I'm in my class giving a presentation as I can control my anxiety there. I don't know how to overcome situational stuttering, if anyone has gone through the same situation as me, It'd be very appreciative if you could help me out.