Haven't seen you for a while. Are you well?

[Silverobama]

I haven't seen a forum member for three days. He used to log in almost every day. We were always chatting in the forum and good friends. I wondered where he had been. I sent him a private message:

Haven't seen you for a while. Are you well?

Is this expression natural? If not, what can I say?

 

[Rover_KE]

It's fine colloquially. If you're interested in teaching him correct English, start your sentence with 'I', as you did in your preamble.

 

[Silverobama]

It's fine colloquially. If you're interested in teaching him correct English, start your sentence with 'I', as you did in your preamble.

He's a native speaker of English.

One last question. Is "Are you well?" natural in this context?

 

[tedmc]

I haven't heard native speakers say that.
The common ones I've come across are:
How are you?
How have you been?
How are you doing?
How's it going?
How are you keeping?

 

[Rover_KE]

Is "Are you well?" natural in this context?

Yes.

 

[emsr2d2]

If you're enquiring after their general health, then "Are you well?" is fine. If you're concerned about them (because you haven't seen them for a while), I'd use "Are you OK?" or "Is everything OK?"