Advice on porn..

So my fiancé knows that I hate porn I just don’t like the image it portrays on sex, but he promised to stop bc I’m always down to have sex like anytime and he knows that. So he’s been fighting his “porn addiction” for a while now and this morning as I put his hand on my stomach to let him feel the our baby boy kick for the first time he tells me he’s hasn’t looked at any porn but he’s been jerking off to different females on Instagram. I just don’t know how to feel.. I’m hurt bc I have real low confidence and body images and I hate my body but yet I still find myself sending him sexual pictures and videos and we have our own that he said would help him. I just have no clue what or how to even do anything about it bc we have had countless fights and arguments over them and his promise are just so empty and I hate the fact that he said he would do it for his son but yet he already let his son down by lying.. I know that sounds silly but it means a lot to me..