Guidance and cold hard truths please:

This is my first and perhaps only post. My DH2B and I met 40 years ago in college.  We were strictly friends. He even attended my wedding to my ex    
 

DH2B married later and had 2 daughters, now aged 22 and 25. He and their BM were married 20 years. My ex and I were married 33 years and had one son, now 24.Our children attended  the same college and get along well