Help.. past trauma and new relationship

Hi guys.. i’ll try and keep this short. I was dating someone for 6 years, we were engaged and about to get married. However i found out he cheated.. he cheated on me with a married woman double his age (she is also a mother to two highschool kids). i was wanting to get past it and work on moving forward because i loved him that much but he just cut off all communication. No closure.. nothing.

A few months later, i started developing this really special bond with someone. I tried my best not to even get into a relationship because everyone kept telling me to be single for a year or so. We didnt make it official until 7-8 months after and we have now been dating for 1.5 years. He makes me happy, i do love him.

But lately ive been seeing triggers of my ex and i dont miss him but the trauma and pain that i went through sometimes makes me think the same thing will happen again? I feel so anxious sometimes.. my biggest fear is experiencing that level of hurt and pain AGAIN.

What do i do?

How do i move past this? Its such a crushing feeling. I sometimes wish my ex had the decency to give me closure but then other people say closure never really does anything. Am i normal to feel anxiety in my current relationship?

Idk how to communicate this to my partner because i font want him to misinterpret this and think i miss my ex.

I feel like the breakup has scarred me. I struggle even being affectionate or saying i love you because i fear getting hurt even though my boyfriend has shown me NO reason to question him…