Psh this may sound like a stupid question but i just wanna know lol?

k so i was talking to this guy who called me random then i told him your like the billionth person to call me that...i guess you should get a prize. hmm...what should i be? (yeah i was flirting a lil) then he emailed me back you could unofficially marry me =) then said some other stuff of no importance then at the very end put Marry me? what is that all about? im confused help plz thanks in advance i didn't take it seriously btw