sleeping dog

So, recently a friend of my past had been on my mind a lot. Since you can just about find anyone online nowdays, I decided to reach out and make contact. After contact was made I remembered why I had let so much time pass without staying in touch. It was one of those relationships that I wasn't invested in anymore and just let the friendship go. Now the only thought on my mind about making contact again is - Why didn't I just let sleeping dogs lie??!!