reserved
1 booked, engaged, held, kept, restricted, retained, set aside, spoken for, taken
2 aloof, cautious, close-mouthed, cold, cool, demure, formal, modest, prim, restrained, reticent, retiring, secretive, shy, silent, standoffish, taciturn, unapproachable, uncommunicative, undemonstrative, unforthcoming, unresponsive, unsociable
3 bound, destined, fated, intended, meant, predestined
2 ardent, demonstrative, forward, open, sociable, uninhibited, unreserved, warm