Eudaimonia In Relation To Buddhism

I disagree with happiness being the end. Maybe I think of it in Buddhist terms where there is desire, and as long as you have a desire for something you will suffer. To be content, to reach happiness, one has to fulfill a desire or desires. However, usually, doesn't one desire lead to another? I had always thought of it in this way. One can reach happiness, but eventually becomes bored or unsatisfied as time passes. So how can a person remain happy? Isn't that also a desire as well, which can cause you to suffer? Perhaps I'm looking at this too much in Buddhist terms.