What should I think and do? Please help me?

My boyfriend gave me an iPhone said it was mine. I ended up see pictures of all he is ex girlfriends/ nude at that even a few videos I asked him about the pics n he said they are just pictures so when I get old and can remember I have the pictures as memories.
And this was almost a month ago.
Now just this morning after he said all his phones vanished I ended finding out he had never lost them and at that he added me to the list of pictures there are maybe 11 or so. Am I ok to feel so hurt and feeling like I'm just another add on do a list?
What should I think and do? Please help me?
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