Is it normal to want this much attention from guys?

I'm 15 and I am pretty obsessed with how people ee me. I dress in short shorts and low cut shirts. I've even sent photos (in underwear and bra) of myself to people I met online. I used to think I was really gross looking, but suddenly I'm getting alot of attention from guys, and I REALLY like it. Is this normal? Or does it make me a slut?