I really appreciate the help and I did indeed read the pages.
I will leave the states inside the 90 days and stay in Canada for a month and fly out bypassing the US all together.
Problem is that my flight out of the north american continent is after 4 months. To prove my intention of leaving the US someone from another forum suggestet that I simply could by a Megabus ticket from Buffalo to Toronto - even if I didn't ended up using it - and show some hotel reservations in Canada.
Do you in this forum think this could solve my problem (so I can get back to the much more fun part of planning my awsome 90 days roadtrip through America:-)
Morten