She left me for her boyfriend..... I'm broken now :(?

I know you'll probably not like my answer, but I think you should definitely move on. One day when her relationship breaks up, she'll come back to you, and then you can conveniently disrespect her like the way she did to you... But If she doesn't even try patching up with you after her breakup, then it was never meant to be...and you'll know your answer then !