Unrequited love serves a purpose as an emotional curtain or a distraction from the real issues that we may be experiencing. Unreciprocated feelings and this pattern of sinking deep into emotions for someone who's obviously unavailable comes from a pattern of past love, perhaps starting early in life That has taught you to crave what is being withdrawn and held back but on the flip side it makes you scared of love that is obvious and available. It kind of results in a cycle of feeling, of emotion, of care that is really unsatisfying and probably often one sided.