GraySenshi :
O it's so we can multi play games at the same time normally I run triple 144hz so if I run 2x games at the same time at 60hz on single monitors rather then waist money on a whole new computer that I wouldn't even have much use for
Let me be very specific here
1) NO you can not 'both play' the same game, you are only SINGLE SEAT licensed for games (meaning one person in front of one computer can play that game you bought).
2) NO you can't "share the game" like your thinking between two people on one piece of hardware (like you do on consoles)
3) Even using SteamBox, SteamController, or other ones adverted out there to 'share your PC games' it is using your gaming PC to 'stream' to the 'controller' or box or "on a whole new computer' that again only ONE person can play the game, but now your playing your PC game with a 'wireless controller' on the big 72" Flatscreen TV in the living room, not on your small PC screen.
4) One way you can share
your library is using the Steam Client's Family Share option, I can allow my kids to play Evil
Genius I bought to play, while I play The Division. If I wish to play Evil Genius I have to 'kick' the kids off my purchased copy on Steam (again remember licensed for only ONE person on ONE computer to play it at a time). But again you have to "waist money on a whole new computer " (in this case the kids are on their own computer).
The SOLUTION to your issue is: Tell Mom / Dad to buy you a PS4 to multiplay games with your cousin. There is no other way to do it.