Researchers trying to determine if getting dumped causes measurable, physical pain-and it apparently does show up on fMRI-needed a proxy experience for romantic relationships in their tests. (It wouldn't be polite to throw people who just got dumped in fMRI machines, I guess, but I still would like to see those results.)
Instead researchers "attempted to elicit feelings of rejection in test subjects by telling them they had been excluded from a computer game". I guess that means getting kicked off a server because you aren't very good at multiplayer is in the same class of emotional pain as a breakup. Go ahead and cry after your kickban. Science says it's okay!