I want to shake the feeling...

Hey ladies, so I have a question...been with my guy for just a little over 4 years...the first 2.5 years of our relationship was very very difficult due to him doing things on his phone that was not acceptable by any means (talking, pics, ect)(he said it was because he has low self-esteem & I was working too much)...after we got through that we moved in together...of course when you live with someone you see how they really live...he is the youngest and his mom & grandma did EVERYTHING for him, he is messy and lazy but working on that with him slowly...lol...I was raised to be very neat, clean, & independent...then after a while we bought a house together & got married...what I am struggling with is I love him more than words can explain & I am scared he is still looking at things/talking to other females on his phone, despite him saying he is not doing that anymore...I know that I physically am not what he looks up & what wows him even though he says I am beautiful and he loves me just how I am...how do I move past this...I have been cheated on in every relationship and I know that is my fears taking over but I want to move forward, we are married and I want to shake this! help......thanks