I think this is the right place to post this... If it isn't, please move it to the correct location! xD

Sometimes I feel like someone else is pulling the strings. I'm a very easily swayed person- I'm not proud of it, but things that people say get into my head and change my actions/reactions.

I'm in a relationship with the father of my child. (We'll call him S.) We've been together for the last six years. I met him on MySpace when I was 15 (I just turned 22, he's almost 25). We have been living together since day one. Late last summer, things took a bad turn for me. I suffered in silence for several years and finally gave up the fight. I left and moved in with my grandmother until I could find myself a job and an apartment.

However, way before I actually left, I entered into an emotional affair with a man I went to high school with. I'll call him P. It was everything I needed that I wasn't getting from S. At the time, S. wasn't working- hadn't for a couple years. All he did was play World of Warcraft. I played, too, but not nearly as much. I don't have a problem with video games or MMOs, but he was addicted to the worst possible degree. He talked to his friends on there more than he talked to me or anyone else. There's a lot more to it than that, but I don't want this to be a TL;DR wall o' text.

To make it very short, I miss the things I did while I was gone from S. There is so, SO much more, but... yeah. I'm confused and I don't know what to do.

Edit: Allow me to elaborate on the problem. I still harbor some sort of feelings for P. It confuses and upsets me and I have tried everything to make it go away. What do I do?