My rejections are getting in the way of running life normally?

k, so im 15, rejected 11 times in a row. ive never had a girlfriend and i probably wont for the next 10 years. the thing is, everyday when i feel sad or lonely (which is 90% of the time, to be honest) i automatically think "if only i had a girl to comfort me..." and i become overwhelmed by it. its really strange and i need it to stop. like when im taking a walk and whenever i go by a place that shows the sunset over a landscape, i always think "if i had a girl i would come here..." and it would sadden me more. how can i stop this?