See, that's the thing, ... it's very possible that either way,
your heart will end up getting broken whoever you date.
Thing is, if you date (1), you kind of already know it's going to
happen ... and in 3 months, nothing emotional (on (1)'s end at
least) will transpire - it will be very physical.
Whereas if you date (2), you also kind of already know that it's
impossible (2) has no feelings for his/her ex ... but something
emotional will eventually transpire so arguably the hurt will be
more.
Very ... pek cek kinda hypo.