How to rebuild the trust?

Hi l am 39M and had few good and bad experiences in relationships but my marriage ended up in divorce 7 years ago. She was very manipulative and her family members were lawyers so created false accusations and narratives that many of my close relatives and friends stopped talking to me. Thankfully my family is still with me. I have gone through a lot during that period and suffered for the things that were not even my fault. After my divorce I dated few girls (my genuine efforts to find a life partner, and no casual things) but I struggle getting close to them emotionally or trusting them completely.

My question is how to move on from that pain from the past that still haunts me and start trusting someone so that I can again get into a mutually fulfilling relationship.