tough break up

samantha
i'm having a hard time managing my emotions. especially because i'm going through a hard break up. 
we have been together for over a year and i think we just moved way too fast and i started to feel so comfortable that i thought i could do whatever i wanted and we would just work it out but he's gotten to piont where he is just sick of it and has changed into a inconsiderate hateful person. 
we have been iffy about each other for a month now and we have been trying to see if things would work out because i have changed so many things so that he would come back and he likes the improvements that i've made but he keeps thinking about the past and holding a grudge so sometimes he just gets mad so now we have decided to stop living together and each other some space for awhile. i'm excited to do that and see what we can achieve by ourselves but i have so much hope and faith that we will find each other again. i'm just scared that it'll take too long and i'll get to the point where i completely let it go when he's still holding on and i don't want to hurt him in that way. i'm just very scattered and would like some advice on how to help me stay in control and be able to let myself be ok