Finally let him go

I posted a while ago about leaving my fiancé and we ended up getting about together (so he thought) for about two weeks. And three days ago I finally had enough and finally told him this time it was over. I blocked and deleted his number all of his messages and changing my passwords to my accounts he has access to. Like I'm so done it's not even funny. And I'm so depressed because he was my world but instead of being depressed and not eating like I did the first time I went through a bad break up I choose to dive deep into my scholastic studies and working out to drop this relationship weight. I want to lose about 70 pounds. I'm not that big at all but I want to look like I did when we first got together. Yes it's going to be hard but I'm beyond excited to see what life has to bring now that I'm single. This is my body now btw