Feel the same here than you
I have give up because i can't change the world and even more because people just don't want to hear bad news..it is as straight and simple than that,sad but true ..
To be honest,i know about peak oil since roughtly a year..and it's just began to
really sink while the last 2-3 months (at least,i don't panic anymore)! I thought like you before that ; got some years of no brainer and have enough time to do it gradually (but faster the better)..
But since november,things have changed..partly because of some words of the olduvai cliff update . Others news like Ghawar who seem to have peaked or will do soon and the news infos of a really sharp decline for 2006 of 14% by year for Cantarel said by PEMEX have make me realise that a lot of hardship will be over us a lot more sooner than i was expecting

..
Not counting that the next economic depression who seem to be coming soon will make any preparatives a hell lot harder to do

!
Anyway,i don't speak of all this anymore..like you,it didn't really have done any good. I do what i can to prepare to help thoses i cherish when times of crisis will come and if i do any interventions,i don't do any mentions about peak oil ..
Here what i do :
1)Prepare/open my mind and be mentally ready
2)Buy books who might be usefull in the future
3)In the process to build new skills like :
Martial arts
Primitivism survival
Learning permaculture
Basic health care
Basic Herbalism
4)Save money to buy land
5)Think about a dog
6)Plan to buy some gears
7)Much more..
This is just the beginning,but trying to make my mind to be used to all this and keep my mind clear is the hardest...
Oh,by the way..don't push too hard on your girlfriend,try to do it by the "backdoor" (like.."honey,what about a garden and things like that)..
Schneider
French-Canadian