My fiance is no longer atracted to me

My fiance and I have been together for 3 years.We lost our virginies together.I hate porn amd concider it cheater the forst time i saw it on his phone I cried untill i past out because I felt ugly and worthless amd gross and he sowre to never dp it again and since then hes never stopped and i talk to him about it and he just tells me oh gell never do it again but they just deletes his hostory I tell him to do it worh me on video call in which we used to do almost every night and he tells hes goimg to amd then goes away for hlurs ata time.I saw a s screenshot of messages on his phone of where he was meeting up to have sex with someone for a STEAM card and he said that he was trolling his friends lives at the adress she sent and that it was spam.He doesn't seem interested in doing anything with me enless were in person I cry all the time because I feel ugly....idk what to do