Issues after my xboyfriend tried to commit suicide in my apartment

Ok so this is kind of long. I had a boyfriend of 4 years who moved across the country to go to school, I at the time was still in high school. We did the long distance thing for a year and it went great so after my full ride to school fell thru I moved across the country for the boyfriend. After about 6 months of being there I started being shown a lot of things. My boyfriend had cheated on me, with multiple girls, and continued once I was there, he as on webpages like adultfriendfinder and craigslist and just doing insane things. He pretty much had a completely other life. I had no where else to go and nothing else to do so we attempted to work it out for a while but it was clear that that, would never happen. After I got a job we broke up. He moved into the apartment next to mine and just wanted to be with me but I refused. He came over one morning and was just begging for a hug, and I refused to give it to him. I went to work where I usually work a double. I was there for maybe 20 minutes before I got sent home. When I got home my apartment seemed flooded. I followed the water to my bedroom door which was locked. I had no idea what was going on so I got the key and tried to open it but there was a chair wedged in there. I slammed into the door until I barely got in and there was probably an inch of water everywhere. I didn't understand where it was coming from because the bathtub was empty. I still didn't understand what was going on. Then I saw his computer, I read the first line of the note read "please dont blame this on one person, it was no ones fault but my own" and then it clicked. When I found him he was locked in my closet. He had taken 2 bottles of tylonal pm and was in shock. I pulled the vomit out of his throat and called 911. All he said was "I love you" and "please dont leave" for days. He spent a week in the mental hospital and I spent every second I could there. We were back together and ok for a while but I just couldn't get over the past. He graduated college and got a job offer back home. So he went, and I stayed. It is now about 8 months later. I have been dating someone new for about 4 months and he is amazing but I just cant move on away from the x. Not because I want to be with him but I just feel like I cant not have him in my life. I feel like I cant move away from the apartment either. You would think that where something so horrible happens you would want to leave but my reaction is the opposite. I cant let it go. I am horrified to. I dont know why. I dont know what to do. My new boyfriend is amazing and deserves so much better. He wants me to move to Florida with him and be with him forever, which I want too, but I cant let go of the apartment and the x.