Haunted by memories of a high school boyfriend

So when I was 16 I dated this guy...let's call him "Danny" for a very short period of time...maybe about 3 months. However, the relationship was very intense for what it was and I fell very much in love with Danny.

Danny broke up with me claiming that he had a drug addiction that was preventing him from being with me. He told me he loved drugs more than me. It was so painful.

I took it really hard and expressed my feelings of despair with angry and hatred towards Danny. I said a lot of mean things about him and I pulled several cruel jokes on him, causing him to hate me.

The summer before grade 12 I called him one late August day to make amends. We ended up chatting on the phone for hours. He had cleaned up his life and was doing well. We ended up meeting up later that week. We spent the night together. Thats when he said to me that he wanted only a sexual relationship with me and nothing more. I was too stupid and young to realize that there was no changing his mind. But I thought I could, I thought I could make him love me again.

Before I had the chance to woo him (and before I had the chance to sleep with him again), I found out that Danny was in love with a girl he worked with at the grocery store named "Fiona". Apparently, Danny had gone to elementary school with Fiona and knew her quite well and liked her for some time.

Needless to say I lost my mind and I resorted back to being hostile and mean. I found out from friends of Danny that one of the reasons why Danny left me was because he was trying to pursue something with Fiona. That he didnt really like me he just wanted to have sex and figured I'd be an easy lay since I liked him so much. This further infuriated me and again, the horrible pranks and gossip and name calling ensued.

Fast forward to prom. Danny shows up with Fiona. I was there with my boyfriend at the time ( was was well aware of my feelings for Danny but just didnt seem to care). I decided to be a grown up and make amends with Danny. I even introduced myself to Fiona and shook her hand.

That was the last time I saw Danny. That was 10 years ago.

Danny and I still have mutual friends to this day that have kept me updated on him and his whereabouts. Although I had moved on to other relationship I could never completely forget him. A couple months ago he and Fiona make their 10 year courtship official in a huge production of a wedding that boasted 400+ guests. I was very sad when I found out. When my current boyfriend ask me why i was so sad and I told him he laughed and said "Sounds like you still love this guy." Sad to say I think I still do. I dream of Danny all the time, and I envy his wife. It could have been me if I had played my cards right and not been so immature and crazy.

I dont know what I would do or how I would feel should I ever see Danny again. I feel like I am being haunted, that his presence still lingers and won't leave me in peace.

Has anyone else ever felt this way about someone or about a relationship they should have forgotten? This was a high school romance and here I am a grown woman and my mind is still with this guy.

HELP! I need some advice!