Funnily enough, I seem to have fewer bad experiences with motorists since I started cycle commuting in South Manchester after 4 years cycling in London.
I think a lot of it is just in your body language while cycling. Not necessarily taking primary position all the time, but looking like you have the right to be on the road, making obvious shoulder checks when you are coming up to junctions or need to move out to avoid an obstacle, not pootling in the gutter, giving drivers the eyeballs if they look like they could do something stupid. Thinking like a motorist helps as well.
I almost never talk to drivers, except for exceptionally dangerous driving. Rarely does it come to anything productive and just creates lingering bad feelings.
As Origamist says, try varying your route, at least you will learn some of the back roads. I even occasionally ride Wilmslow Road/Curry Mile/Oxford Road just to verify that my current alternative (A34 40mph dual carriageway) is better/faster/safer (which it always is as there are fewer opportunities for motorists/pedestrians to do stupid things, FAR fewer buses, more space and the cyclists along that way seem to be more experienced and less student-y.)
Oh and yeah, these things come and go, try to forget about it and just enjoy cycling in nice-ish weather.