Need advice. Fiancé looking at other girls on tiktok.

Me and my bf have been together for a year and just got engaged. I know he loves me. he tells me everyday how much he loves me and that i mean everything thing to him, that he can’t wait to marry me, etc. and i love him back the same. we’ve had a couple struggles in our relationship about him looking at other girls on tiktok. i’m the past he would follow them, like their videos, and they would be all over his fyp. The first time i caught him looking at a girl right in front of me but he thought i couldn’t see. i confronted him, in tears, and told him how crappy it made me feel. and he was extremely apologetic, said that looking at those raunchy videos meant nothing to him and he even deleted the app. I told him he didn’t need to delete it just don’t look at those videos. months later he re downloaded it and the problem started again. i noticed he was liking the videos and following the girls again. i lied and told him that my best friend was having problems with her bc bc she found out he was looking at girls on tiktok. i said that if it were me i’d break up with him if it kept happening. i said that i considered it cheating and that i wouldn’t stand for it. that day he deleted his tiktok account and made a new one. i asked why and he lied and said he did it awhile ago bc there were a lot of girls on there from before we were together. i didn’t care that he lied bc he had fixed the issue by creating a new account. on top of this, we don’t have sex often maybe twice a week. i don’t think that’s very much for a couple that has only been together a year. i ask him why he doesn’t want to do it more and he says he just doesn’t have a high sex drive…. i’ve told him before that i thought it was because maybe he didn’t find me attractive enough but he always reassured me… anyways, for about a month his fyp has been clean. i went on his account to check and his search history was full of girls… and we just got engaged 2 weeks ago. i don’t know what to do. do i just ignore it and trust that he loves me? im just worried that this could turn into cheating in the future.