Laurie, I agree with Karen, one can be known as "easy" in taking people in. I think you are getting that reputation for these young people who want to drift in and drift out, it disrupts your life when this happens.
When we moved to California, everyone we knew wanted to see California and we were unindated with friends, family, friends of friends until we said NO MORE. Either you are going to move to a one bedroom home or say O.K., No More.
Jackie