how can i trust my boyfriend??

in the past he has lied to me about places he goes and who he is with, he has lied to me about talking to this girl, whenever he was talking to her he hid from me and also told her that she could have a boyfriend when she comes into town, i also asked him not to look at porn because it is a issue for me when i hate my body right now but he lied and said he doesnt look at it when he did.

i forgave him for it, and I am starting to trust him again but i live in the past so much, how can i move on from it. he doesnt talk to the girl anymore nor does he look at porn and Im starting to trust him only because he loves his daughter and our new family so much that I honestly dont think he would find ways to mess it up. can anyone give me advice to move on and trust him??...to not always hold grudges.??