I need a little bit of advice here. I will try to keep this short.. Me and my ex broke up 7 months ago after being together for a year on and off and we were friends for a year before that. It was very emotional day that started with mean words and fighting and turned into a lot of tears and we ended up getting intimate before he left which was probably my mistake. Just a week before he left me an emotional voice mail saying that he misses me and thinking about me and how we can't live without each other and every time we try to break it off faith keeps bringing us back together. The day we broke up he seemed so heart broken but he also told me that he was going to be with this friend of his to get over me and he doesnt want to be alone. We were not friends on facebook at that point because I unfriended him when we had an ugly fight a month or a few weeks back. Apparently he did not waste any time and announced their relationship on facebook the very next day after we ended, which was very selfish and painful. My ex is diagnosed with bipolar disorder and people with bipolar often have a "switch" that we don't have. They fall for you very hard but they are also able to have no regard for other people's feelings when they are done with you and shut you out like and off switch and fall for someone else right away, which is exactly what he did. We were in no contact for 5 months and I was in a car accident, he found out from his mom and came to check on me. He seemed very happy and was very quick to announce that he is still with that girl and doing great at his new job and was practically bragging. I acted like I was happy for him and I was at the time but it was still like digging a knife every time her name came up. I believe that he was having a manic episode which can last for months and alter the perception of reality. After that he was texting me for a few days and then disappeared again for the past couple of months. I have been doing fairly well, working on myself, happy in new friendships and my job and hobbies in general but as much as I want to move on and let go so much I am unable to get him off my mind. When I saw him last time he told me that his company is sending him to a conference in Nashville 3 weeks from now, which I am also going to attend through my job. I have been anxious and excited to see him there and possibly spend a little time together but am getting scared that it will make it even harder for me and hurt me more.
Today I was going through some things in my house and came across an old Christmas card from last year that he gave me with words of love saying "I'm the one" and stuff like that and I just burst into tears. I have been visualizing happy times with him but this is starting to make me sad. I'm not sure what to do or should I try to keep communication with him minimal in Nashville and stay away? I'm so confused right now. Please help!