[Precarious.]
Main Entry: pre·car·i·ous 
Pronunciation: pri-'kar-E-&s, -'ker-
Function: adjective
Etymology: Latin precarius obtained by entreaty, uncertain -- more at PRAYER
1 : depending on the will or pleasure of another
2 : dependent on uncertain premises : DUBIOUS <precarious generalizations>
3 a : dependent on chance circumstances, unknown conditions, or uncertain developments b : characterized by a lack of security or stability that threatens with danger
synonym see DANGEROUS
"He was most precarious, as it seemed he was in love..."