English to latin translation: "Your guide for life"

tui vita ducis enim.

one of the veterans check the order i have put it in!!!!

(dont quote me until the experts have spoken)

Do you mean a guide to life (that is, showing how to live) or a lifelong guide?

By the way, if this refers to a book used as a guide to life, there is
already a Latin phrase commonly used for that: Vade Mecum (literally "go
with me").