confused in love

my boyfriend and i broke up a month & 6 days ago. i miss him so much. i’d do anything to have him back. he saved my life when we started dating. now i feel like taking it again.

i just found out a week after we started dating he tried to get with the girl he told me not to worry about. she turned him down but it still hurts that he even tried.

i feel that if i get over him and forget him, he’ll forget about me too. i have a fear of being forgotten by the people i love. do i keep trying or start to heal. will he forget about me? what’s even the best thing to do here.