Why do guys keep starring at me?

Its getting onn my nerves it can't be my body cuz I'm not so freakin skinny supposably I'm pretty which I dnt believe....ppl online tell me that I am n a few friends....but like for example on Sunday I went shoe shopping I was dressed good I had makeup on and yea I went to the car and der wer these to guys walkin by meh one of dem wer starring and den u could totally tell dey wer talkin bout meh n wen I was leaving da store they passed me again and that guy was trying to show off...there's also other occasions that guys stare like today creepy does any1 noe why they stare and who really knows how to read guys maybe sorta wat they possibly think