Books where the MMC is a lonely loser and the popular/socially active FMC “picks” them?

Having a bit of trouble finding this so maybe its too specific? But I'd like any suggestions where the MMC is your run of the mill loser in his 20s who is lonely and has no romantic prospects and the more "normal" FMC picks him (kind of like the whole "extrovert adopts introvert" trope but [...]