I would agree with your friend. The house is a major step and it doesn't sound like the relationship is at the place for that kind of investment. To me it's kind of like having another baby together....definitely premature for the stage your relationship is at. She's not to the point of buying different houses together.
Let me ask you this....are you comfortable that you will be together a year or two from now? How long before you feel convinced that she loves you? Have sex/make love? I just think there are a lot of hurdles that still need crossed before taking it for granted that your D is busted.
Just MHO.
Me
In the end, it's not the years in your life that count. It's the life in your years. Abraham Lincoln
It is hard to fail, but it is worse never to have tried to succeed. Theodore Roosevelt
