..Losing Hope

so this years my first year of high school and before this year i had never really cared for a boyfriend...yea i had crushes but i was fine with just having my friends. and then high school happened.
This guy and i had been flirting for a few weeks and i really fell for him. Unfortunately, some stuff happened and everything ended. it wasnt too big of a deal because i realized he wasnt even worth it because he was flirting with many more girls.
Now, in one of my classes this sophmore and i have been flirting a lot and everyday i think how stupid i am for doing this again because it will just end up like the other kid and i just feel like its not worth it to go throught so much effort...again.