Which statement is true: (1) If someone returns to your life after you have let go, he/she is your friend for life. (2) Friendships are meant to come in and out of our lives.
Both statements are true. There are many reasons why people return back in your life:
1. they truly miss you/ the departure was unintentional (a true friend)
2. to use you
3. for them to either learn from you or for you to learn from them (destined return)
In the same since this is why some friends come and go.