What COULD OR CAN i do about this girl i like?

Hello peoples,, im 14 and i kno im young for love and everything but i cant help what i feel. i like this girl and ive already admited feelings for her. she has already said she liked me back and told me to wait three months. i had no problem with it and i promised i would.(knowing it was a long time and probly i might lose intrest) i used the time wisely by geting to know her. everything was just terrible between us when we got close. immature friends of ours and the nosey people watching us PDA. (we dnt see eachother out of skewl) we were able to go out but everything got realy intense, so we took a "pause" in our relationship. now im sorta heartbrokin and she is trying to give her ex a SEVENTH CHANCE,i told her that i was sorry for being a jerk and not considering her feelings toward that pause and i dnt think she knows my true feelings for her.now im worried they might not break up because relationships are like learning to ride a bike, its gonna take some tries befor you get it righ. i realy need to know what to do because i feel she could be my last gf ever if u know wat i mean. (im not smooth with the ladies and i attract all the girls i realy dont like. ive only had 5 gf and 1 real relationship, one that was perfect) what do i doooooo??????? help pleaseeee