Lovestruck (3.5e Flaw)
From D&D Wiki
You love someone with your whole heart and it shows when they're not around.
Effect: Nominate one other player character to be lovestruck with. If you are further than 60' away from your lover, or if your lover is at 0 hit points or less, you are shaken. In addition, such is your sympathy with your lover, that if he or she is sickened, nauseated, fatigued or exhausted, you also suffer from that condition.