Dan, 21, broke up with teenage sweetheart Courtney Davies, 19, last year, and her sister lives next door with her own boyfriend.
Keen rugby player Dan was stunned when Courtney and sister Stephanie, 23, shared in the Euromillions jackpot won by their mum, who bought the ticket to celebrate beating cancer.
Now Dan will see next door neighbours Stephanie and Steve Powell, 30, living it up in luxury which he could have shared if he stayed with her sister.
Dan said: "All my mates are savaging me about this - the first I knew of their win was my phone going nuts.The boys were all sending me links and jokey snapchats asking if I was gutted.
"One said: "How much have you cried since you found out mate?"To find out they've now won the lottery I'm happy for them - but obviously feel like it could have been me.
"I just put my head in my hands."
Dan joked: "She could give me a million a year for the two years I went out with her - I wouldn't say no to that."
Source: UK Mirror