Why are guys noticing me now?

I the past two months or so, things (relationg to boys) have been changing for me and I don't know why. I'm not complaining, I'd just like to know what I've done or what happened for things to take this more positive course. All of my teenage life (I'm 17 now), I've been used to guys never noticing me or paying attention to me, Up until now. I've had two guys asking for my number and texting me the same day, (one of them asked me out after a couple weeks) one guy leaving me his number and calling me when I texted to say thanks a few hours later and then I get whistled at when I walk at school or on the road. It's nice and all, I just don't understand why it's happening now and pretty much all at the same time? What do you think? Thanks!
Why are guys noticing me now?
Post Opinion