> ...I never will do is cross the "just business"/"personal" line with anyone I may or am working with.

Just in an interview situation, or you will just never be open to a personal friendship with anyone you ever work with?

> you will just never be open to a personal friendship with anyone you ever work with?

Building relationships with colleagues is possible but I have tried to be careful. I have made some friends over time that were once co-workers. However, they were only able to move to full friend once they moved on to other teams or companies. I don't see someone I work with day-to-day as a personal friend. I compartmentalize them, keep the relationship professional and cordial.

Moving someone to a personal friend has risks, especially if there is a chance you may work for or with them again. Some personal friendships may be able to outlast work drama, but so far I haven't had that happen for me. I've lost a few along the way due to negative conditions at work.

Have you had a personal friend that stayed around after leaving a bad situation at work? Any pointers?