Why so hesitant?

I got a facebook message a couple days ago from my cousin, Tami.  She asked if she and her daughter could spend Friday night at our house.  Of course, she was welcome to come.  I really enjoyed visiting with her and finding out about her family and life. The thing is, I haven't seen or talked to her for probably 5 years, and before that it had probably been 10 years.  I am wondering why we hesitate to connect with family unless we have a specific "reason"?  I know that I feel awkward just dropping in to visit anyone that isn't immediate family.  But why?  I am a little bit jealous of people who are good friends with their cousins and extended family, and want to have that in my life.  I think maybe we are all afraid of interrupting schedules, and intruding where we might not be wanted?  Anyway... I love my family and want to be close to them.  I will have to work on taking the first step and reaching out.