Do you know someone who is intent on keeping you in their life on their own terms and at arm’s length? It tends to happen when there’s a history.
It’s usually something that builds up over time, but if you’re not particularly bothered about the relationship being kept at arm’s length, it may not be such a problem and usually has its advantages. In some ways it will probably make life easier, because that person isn’t in your life full time, therefore you have less to worry or think about.
For some of us though, this kind of relationship may be more stressful, because of having to keep up the pretence. If that is the case, it would always be worth choosing where you stand.