Japanese word "setsunai" How do you translate to English?

Japanese word "setsunai" means not just "sad" but also sentimental or slightly distressed and still loving emotions are in it, i think. I always don't know how to explain this feeling in English.
Update: I just look up my dictionary again(I have done before the question, though). And
切ない(悲しさ・寂しさなどで、胸が締め付けられるような気持ちだ。)
感傷(物に感じて心をいためること)
So I don't think it has nothing to do with each other.
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