Windows 7 Startup Repair Loop Ruining my life?

You should try Safe Mode, too (just Safe Mode, not with networking). This problem may be a hard drive issue, it may be an operating system issue, but there isn't a whole lot of troubleshooting that can be done on such an issue online. You might be better off, if Safe Mode also won't let you in, taking it to a professional to have them look at it- they can try and slave the hard drive as a secondary drive on another machine, among other things.