My friend lives in my direction (with a 15 minute detour) and she has started just following my to my car when we are out together (social or exercise class). She doesn't even ask for a lift but expects it, and I've had to amend plans to go in her direction when I wanted to pop elsewhere (e.g., a supermarket or to see family which are not in the same direction). I've even let her know that I had other plans afterwards, however it's then 'too late for a bus' so I feel guilty and scrap my plans to take her home instead. I don't mind giving lifts at all when I am going in that direction, but it's really bothering me that she doesn't even ask. And then I feel like the awkward one! How can I gently get her to understand that she can't rely on lifts all the time? Or am I simply BU?