I FEEL SOO BAD OF WHAT I JUST DONE TO MY EX BF !?

We were the most perfectest couple ever i really thought i was gonna spent the rest of my life with this boy we were engaged for 1 month yes im young im only 18 but i know what love feels like cause i know what im feeling but anyways i loved him dearly we were already setting our lifes up " finding apartment " things like that ect. BUT latley everyday of every second we would fight fight and fight and everything just went wrong ! we were messenging on facebook one night and i got mad at him and OUT OF ANGER i got really mad at him and said it was over and i was tired of trying and he was tired of trying so i deleted him off my facebook and told him it was over but i didnt mean it every since then i was mad at the fact he didnt try to make our relationship work i hated the fact he made me believe he wasnt gonna let our love go and if we had a big fight we fix it like he promised i hated the fact he bought me an engagment ring and then dont even care to fix our relationship i got so angry that i did something ver imature and sooo messed up i posted a picture of his so everyone who knew him would see it on the internet cause i was so mad and i wanted him to hurt the way i was hurting now that its said and done i cant take it back and i feel bad but then im still hurt that he dont want to be with me =[ i need some help advice anything !