<human>: Can you give me the gist of the text in a nutshell?

So basically after breaking up we were still close, it wasn't helping either of us. So I decided to have no contact with him for a couple weeks probably a month or longer. Recently we've been talking more often. I felt that he was okay with the break up when we first got out of our relationship, but I was crushed (it was mutual). It took me some time to recover and not be so sad anymore. So, during this time I began to do things that I hadn't done before. I also slept with a guy. I feel a bit guilty now that we talk a bit more since I haven't told him. And to be honest I feel that I have moved on a bit more than he has since he still makes attempts of spending time together as if we are together. I am not sure how to approach this. I have no clue what he has done while we haven't been together. Part of me feels really guilty but at the same time I can see that there really can't be any relationship formed at this point. I feel bad distancing myself from him because I enjoy hanging out with him. I need some help. I don't want to say goodbye because I still care for him, but I feel like it's holding both of us from entirely moving on.
<bot>: I would like to know what is the best way to say goodbye without it being so emotionally draining. Should I tell my former bf the truth about what I've done while we haven't been together?