If you cannot end the war quickly, you better switch to communism.War Weariness alone is enough reason-you will end up in anarchy if you stay in democracy and don't make peace.I don't know how many units you have, but communism will give you 240+ free support - of course you lost the trade bonus, but in your situation most of it is cancelled because of WW, whichs means upping the lux slider or meking entertainers.
Is your empire rather dense or spread out? Your city number is still in the "green" area in terms of OCN (at least if you have an FP), but you will have an definete advantage if your empire grows further or is widely spread.
I suggest to switch to communism.