What do you think I should I do?

So, I’m the car going home. my twin sister just told me that my boyfriend is pedophile? My sister said that he’s done this to tons of girls and that my sisters friends littler sister has a friend that is in middle school (8th grade) and he talked to her or something. (I’m not sure what he did, my sisters friend just told my sister)

My boyfriend and I are both 17. He’s online school and I am not but I have had him in my school/class freshman or sophomore year. My sister just tells me to block him. But the whole situation is confusing and so shocking to me I don’t know where to go from here.

And he’s asked a few times for pictures of my outfit and asked about sex maybe 2/3 times which my sister says it’s weird because he asked for my outfit a lot. But I thought that this was normal for a boyfriend to do in a relationship.

What do you think I should do? I don’t want to talk to him about it because it’s just kinda awkward.
Options please?
What do you think I should I do?
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