Boyfriends phone

So I’ve been with my boyfriend a while now, the talk of getting married has been heavy recently but I’ve been super bothered by the amount of old photos of other girls on his phone. I’m talking naked, all the works pictures of randoms before me. Ive asked him multiple times to please go through and get rid of them (I’ve taken hours to delete as many as I can find) and every time I go to look for pictures of us or use his phone I find another. Now another thing that bothers be (please let me know if I’m being over dramatic) Is the slutty tik toks he’s saved and liked in the past just week. (I have terrible self image issues and it bothers me terribly). So what should I do? How would you react at this point?