What happens if you just can’t move on from someone?
I was with someone for 5 years, living together and engaged. We broke up 2010 under differcult circumstances.
(I was unknowingly suffering from severe PTSD and as a result had alcohol / drug problems)
He immediately met someone else, within a month and they were together ever since.
3 weeks ago he messaged me out of the blue after not hearing from him for 9 years. Turns out they’ve split up and by the looks of things he’s now single.
I’ve been dating someone for 4 months who I thought might be the one for me, however all of these feelings for my ex have come flooding back.
It’s like we only broke up yesterday 
I realise that ex and I probably wouldn’t work out now and I have no idea if he’d even be interested, I think he’s moved well on since me and new person was better looking etc.
But what I can’t get over is remembering how in love we were, how much I adored him. The fun and love we shared. Even 4/5 years in I’d still be so excited to see him every day, loved just the smell of him.
It’s like I’m pining after that feeling but not sure I’ll ever have it again....
has anyone else felt this way? Sorry for the ramble!