“永远”一般不这么用，都用“一辈子”，“总是”，“一辈子”是中文中“all one's life”的意思；“一个人”可以“孤单”来代替，这样比较口语化。比如，我不愿意一辈子都孤单，我不愿意孤单一辈子，我不想一辈子孤单，之类的。希望我的意见能够帮助到你。
recently this topic is so popular that has many variant statements, both durk's and Wozitoya's are in use. But I think the word 永远 is usually combined with good meanings, such as 我会永远爱你（I love you forever）,and we use "一辈子"instead，maybe we wish to have second or new birth, and not to be alone the next time.(*^__^*)
May my answer helpful for you.