Sentence:  ... since I know no greater Pleasure than the Love of you, I should too willingly run the Risque of any Disadvantage that could happen by it. I <WSD>die a thousand Deaths</WSD> every Hour, and still revive, to die them over again ... 
Meaning of the word marked with <WSD> tags:  To suffer repeatedly ("often mentally rather than physically"); to suffer extreme embarrassment or anxiety.