But I can't resist a good romance conversation so here's my opinion...
I'm kind of thinking that deep down, your friend knew that things were drying up between them. The spark was dying, so he wanted to create a new one by doing something exciting such as getting married. I say this because I don't think that if he truly loved someone enough to marry them, that he would throw that away just because the other person wasn't ready. Does that make any sense? I know my girlfriend's (it's our three month anniversary today) parents never got married, but are together and have no intention of ever leaving each other.
If she was never really into the relationship to begin with I don't think she would hang around for 3 years... perhaps she simply wasn't ready. And I dont' think your friend was into the relationship anymore.
