<human>: Give me the gist of the text in a nutshell

So to make a very very long story somewhat short. I dated a girl a few months ago and back then, I was pretty bad. I wasn't a good boyfriend and I did things I'm **not** proud of. and as a result of my behavior my then girlfriend broke up with me. Which left me devastated. It fucked me up good. 

After her, i quit alcohol and drugs, which weren't issues for me but was still par for the course. and the entire time I'm mending, I'm thinking about how much I want to be with Denise. Fast forward to 3 months ago, I meet Jackie. And she is great. I stop having those thoughts about Denise and how I want to be with her. She practically starts living with me from the second day. Which wasn't a very good idea. 

But after that month, I start getting these feelings back. Those yearnings for Denise. I know I'm putting Denise on a pedestal and it is a part of the problem. But it's like when I'm with Jackie, I think about how much I wanna be with Denise. I knew I got together with Jackie too soon. 

After Denise broke up with me, I started going to therapy, writing about my feelings and growing myself as a person and all of it is starting to feel a little bit crushed by this slight obsession I have. I want to let go. I don't want anyone to get hurt. Jackie also has her own set of issues too. 

I'm manic depressive and Jackie is at the very least depressive.

I want to be with Denise but I'm not going to go to come from a place like this, that is so desperate in the fundamental sense of the word. 

I also want to be there for Jackie and see if there is more here, but this seems difficult considering both of these people (while present or not) are pulling me in opposite directions and making it difficult to live my life.
<bot>: Girl broke up with me a few months ago, left me devastated. Months later is still effecting me and my current relationship.