Yes I do and lately I have been thinking about this a lot!! I have a wide group of 'friends' but really they are people I used to know who are not really in my life anymore. I find they are the sort of people who make contact when they want something like they have moved back to where I live (after 5 years of no contact etc) or they have a gig or show on and they want me to attend.
I am struggling lately with the concept of a friend and last night went out for dinner with a friend (a real one!) and we talked about this. I guess I am looking at not keeping these people in my life.
On the way home I was listening to this guy talk about friendship on the radio. He said something that has summed up how I feel. Friendship is two way. You have to give to have a friend, many people just take and don't actually put anything into a friendship. He said a friendship is like a partnership and you have to put in time and emotions etc. He also said it is two way and people get scared of investing in frienships as they think they'll lose something but in reality if we all put in, we'd all receive too.
Hope that makes sense. He explained it nuch better. I don't really think that answers your question but for me I am looking at continuing friendships with those that genuinely care and without sounding cold, letting go of those who don't.