When I hear people say that you can't keep your JW friends when you leave I can understand why they say that. However, I can also see how that is a generalization. I remember my life growing up as a JW and having good friends who were Jewish and Catholic and Protestant and Buddhist and Hindu and Muslim and Atheists. I didn't try to force my religion down their throat and I respected them and they respected me. School and work expanded my exposure to different viewpoints. I also had some JW friends (and a lot more JW acquaintances.) As some of JW friends faded or were kicked out I still kept in touch because they were first and foremost, friends. Later, when I became a ex-JW some of my JW friends still kept in touch and visit and call. I guess because they are real friends and that is rare because they risk expulsion if discovered.
People who are "in" probably don't ask of their friends "if one of us were to leave the JWs would be still keep our friendship?" I guess that is something they might want to consider before determining who their friends are. If you can't be honest and truthful with your friends then you need to find new friends. Is there anyone else out there who has managed to keep friendship with JWs after they exit or kept friendship with exJWs when they were still in?