I need an injector for bf3

I would use Winject.

What does it matter, all of these injector throw up same errors. MSVCP110.dll is missing. When you download the file again, still doesn't work. Reboot, redownload still nothing. Disabled antivirus, firewall, still nothing. Beginning to think everything from this site sucks balls and is full of viral shit.

That happens on every working injector on applications with missing file/files. You have to download missing file and place it into the folder, where application, that You want to inject Your .dll file is located. If You do not know, how to download the missing file, just google it's exactly name, for example http://lmgtfy.com/?q=MSVCP110.dll and download it, I recommend dll-files website. Remember, that every letter and number MUST be correct, otherwise missing file error will be shown again.

EDIT: On dll-files website, click grey "DOWNLOAD ZIP-FILE" button to correctly download Your .dll file.
EDIT2: NOT EVERY .DLL INJECTORS ERROR FILES ARE STORED ON DLL-FILES SITE, BUT MOST! If Your missing file is the one of them, just download it from some other website.