It's definetly possible...
I'm still in touch with a few models wich left the site for different reasons. With some I talk daily, with some weekly or monthly... But its still a friendship which has grown over a longer time.
And I have good contacts to performers which are still working.
It just needs to grow. Its up to you how you see it. If you think you are hiding and safe behind your screen it's hard to find real friends. But if you talk honest and respectful to the ones you like, everything is possible.
LickaU said some nice sentence in one of his threads and calls it "rule #1"... Treat the people like you wanna be treated.
Amen 
Treat people Right - Not scientific , but easy way to make and KEEP friends
I have been on this site over 5 years - I have made friends with many members and models
Friendship is great - Romance and unreasonable expectations can cause undue stress and trouble sometimes if Members expect too much
Blame it all on my roots
I showed up in boots
And ruined your black tie affair
The last one to know
The last one to show
I was the last one
You thought you'd see there
And i saw the surprise
And the fear in his eyes
When i took his glass of champagne
And i toasted you
Said, honey, we may be through
But you'll never hear me complain
(chorus)
'cause i've got friends in low places
Where the whiskey drowns
And the beer chases my blues away
And i'll be okay
I'm not big on social graces
Think i'll slip on down to the oasis
Oh, i've got friends in low places.
Well, i guess i was wrong
I just don't belong
But then, i've been there before
Everything's all right
I'll just say goodnight
And i'll show myself to the door
Hey, i didn't mean
To cause a big scene
Just give me an hour and then
Well, i'll be as high
As that ivory tower
That you're livin' in
*chorus*
(third verse)
I guess i was wrong
I just don't belong
But then, i've been there before
And everything is alright
I'll just say goodnight
And i'll show myself to the door
I didn't mean to cause a big scene
Just wait 'til i finish this glass
Then sweet little lady
I'll head back to the bar
And you can kiss my ass
*chorus*
Quote