is it possible?
Can you better describe what you mean?
1) How would your friend find out?
2) How do you want to hide it from him?
3) I have no idea what you mean by saving it in your mouse.
1)if i go to their house to play i have to download autohotkey on their com
2) is there anyway to hide it? idk how to hide it
3)nvm dun care about this question
Technically you don't have to download autohotkey; your script can be compiled into an executable file. (Though that might make it more likely an anti-cheat program flags it.) ahk2exe
Hiding it? Uhm, #NoTrayIcon I believe is the best you'd be able to do.