history: I knew that when my best friend told me she would always be there for me, that I could have great confidence in her. She's always been a good listener in the past, and has never been anything but supportive when I've gone through rough times. I used to worry that I would never have a long term friend who would be there to listen to me if I had problems_comma_ but my best friend Kayla has proved otherwise. 
current: Kayla sounds wonderful! How long have you guys been friends?
next: I'll have known her for 7 years next year. She really is wonderful. I've gone through a lot of tough stuff in my life, and she's always been supportive.