Maybe we just need to get him starving.
TBH, I'm not sure what you mean by this
If you mean to try to get him to take the bottle at the feed that he would be hungriest (and therefore most interested in) then that's not a bad idea. The first am feed might be a good one to try, especially if there isn't a night feed close to it, as he would likely be hungry and possibly more receptive.
If you mean to offer only the bottle until he's hungry enough to take it, I really, really have to advise against that. Your little guy is 6 weeks old now and there is a HUGE growth spurt about to happen, if it isn't happening already. If there was ever a time not to do a cold turkey bottle introduction it is now. If anything, as frustrating as it might be, I would even suggest stopping the bottle (or at least only offering it for one feed per day) until you get out of this growth spurt. The frequent feeds are important for him to get the calories he needs to grow and develop properly, and for your milk supply to increase to meet his growing needs.
Here's some more information on that growth spurt for you:
http://babywhispererforums.com/index.php?topic=66001.0(((hugs))) I completely understand how frustrating this is for you - I have been there