Feeling helpless, lonely, or insecure because there is little or no support.
初めての一人暮らしで夜は少し心細い。
I'm a bit anxious/uneasy at night living alone for the first time.
暗い道を一人で歩くのは心細い。
Walking alone down a dark street feels unsettling.
連絡が途絶えて、だんだん心細くなった。
As contact was lost, I gradually felt more helpless.