in my 18 years of existence, i've never yearned to see anyone so much. i'm thinking: ten years later i will probably have realized my wish and met you. And when that happens i will most likely be crying many a tear out of excitement.
我帮你改了一下,仅供参考:
(1,翻译不要紧贴原文,2,不是用词或句多么复杂就是好的,关键要舒服通顺)
Over the past eighteen years throughout my life, for the first time, I'm so eager to see the person. I think I will have met you ten year later as I wish and must excite with tears.