Should i risk asking this girl out?

i have recently asked out three girls my own age. the first one said no cuz she didnt know me well enough. the second one was already my friend but said no cuz she already had a bf. the third one was friends with me but a friend of mine asked her out for me before i was ready (i wanted to do it myself) and she said no. i like another girl whos lockers by mine, whos in my homeroom, talks to me occasionally, and i dont think has a bf. nobody else knows yet and i think she might say yes but i cant help but be skeptical on account of my last three rejections. should i ask her out? idk how i would take another rejection but i dont wana stay single