I've too been an "invisible" person all my life, who everyone ignores and don't even bothe...

I actually more than once was walking with a group of people only for someone to say out loud "where's xxxx wasn't she with us" and I'm just right there "I'm here" and everyone jumps like I'm a ghost lol when I was younger I accidentally kept jumpscaring people just by entering a room or being in a room when someone entered because I'm so quiet when they finally see me it's like this: "ah! The heck? since when where you there?" And I go "I was here the whole time?"