So you think in 6 months of dating you know enough about a person to make a serious commitment to them? Or to continue dating and DBing the relationship even if you find out at 7 months that they are not at all who you thought they were? What's the line for you - would you keep trying to salvage the relationship if you found out they were hiding an addiction? A gambling or shopping habit? Serious financial irresponsibility? Infidelity? Would you stay if they became permanently quadraplegic and brain damaged at 7 months of dating? If you discovered they had untreated/untreatable bipolar disease with severe destructive manic episodes and you just happened to be dating them in between episodes?
I know different people would have different answers to this question in different situations with different people, but I would argue that at 6 months in, you are only just beginning to find out who the real person is, not the infatuated fantasy you have about them. So at what point would you consider yourself not committed to "making it work" after saying ILU if you found out one of these things about them?