不知道这份恋情能否长久,但我一定会在有限的时间里好好珍惜 这句话用英语怎么说?

I'm not sure how long this relationship will last,but I will definitely treasure it in this limited time.
No matter how long this relationship will last,I will always treasure it.:) （不管这份恋情有多久,我一定会一直好好珍惜.）
个人觉得第二句更浪漫~