I want my ex back!

I am really desperate. I cheated on my ex boyfriend and he broke up with me. I fully understand why he had to break up. I definitely did something wrong and I would never do it again. Never in my whole life. I am in love with my boyfriend and I really would like to get back together with my ex. I know that only time will tell if he is still in love with me. I guess it is not a good idea to call him several times a day. Probably I should let him know how special he is. I am not a very creative person, so it is hard for me to find something real romantic.