Emotional wreck

My ex boyfriend broke up with me because he thinks I don't have a strong head for him and only him. When I went to Florida I was feeling my friends cousin because my ex and I broke up. I told my friend I wanted to have sex with her cousin but I really didn't. Nothing happened. He read the texts and chose to stay but two weeks later said he deserves better. We've had a history of ups and downs. I want him back so bad. I don't know how to get him back. He told me time will tell and to give him space for a month but I don't believe him. He won't come get his things either he said throw it away. I'm doing no contact thing but it's kind of hard. I need advice asap!!