Ah nostalgia. From the NY AMP scene, Ami is probably the longest I've seen, though not always regularly. I believe I first saw her in 2005 (maybe 2006)...and the last time I saw her was maybe 2015 when she got married and retired? There was a few year stretch in between when she was temporarily retired as well.
Cherry (last at Asian Lassies) I've seen since the first week she started and hopefully I can continue that streak when this pandemic is over. Chanel (of Hot Lips fame) I started seeing a few months into her career and last saw her maybe 2-3 years ago? Kelly (Chanel's friend and still active) since maybe 2010? Miki (last at Twinkle) from 2011-2015 (2016?).
I do have a few girls I no longer have sex with but keep a tenous connection with through social media/messaging apps...a stunning model level all natural Korean girl I've seen since 2005 who is married and raising a daughter with a guy who has no idea what she used to do and posts nice domestic family life photos on FB all the time.
Another Korean girl I first saw in 2008 and still text with every now and then when she's bored in between banging clients in whatever city she happens to be in...love the casual manner in which we discuss how her work day is, how busy she is, how she has to run off to service a GFE or PSE client, getting her opinion about girls I am dating or paying for sex, etc...