EMERGENCY: My friend made up a fake boyfriend & it's driving me C.R.A.S.Y!?

I have a friend named “Roxy". I and she are both 13years old and we have known each other since 6th grade. I’ve had alot of boyfriends and she's only had 0. "Roxy" made up a fake boyfriend. I know he is fake because the pictures she sent of him were copied and pasted from the internet. Plus she has blonde hair and in one of the pictures, the girl has brown hair!! What’s up with that?!! I tried saying "hey what's up with the picture? I saw that picture on Google images..." and she's like “that’s weird idk". Then I said “I never see your face in any of your pictures...” and she plays dumb. Also he supposedly moved to New York when we live in California. She won't even tell me what school he goes to!! "Roxy" is VERY pretty and I wish she wouldn't make up fake boyfriends! She could get a boyfriend, trust me. I know the pictures are fake FOR SURE. I’ve been going along with her fake relationship for about a month now. He seems a little too good to be real! What should I do? I know he's fake so should I tell her?