لطفا خبری از خودت به من بده، امیدوارم که حالت خوب باشه،هر چند من ازت بیخبرم

Question

نگرانی از دوستی که مدتی ازش بیخبرم 

Answer 1

Let me know if you are ok (keep me posted),

I hope you are fine though I haven't heard from you.

Answer 2

Please keep me informed about you,hope you're doing fine. I am unaware of you ,though.

Answer 3

please bring me up to date on what has happened to you, I hope you are in good health/well

I have had no news from you [in a long time],though.

Other ways:
Can you bring me up to date?
Can you fill me in?
Can you catch me up?
Can you let me know what's been happening?
Can you give me a run-down on what's been happening?