ambivalent

from WordNet (r) 3.0 (2006)

ambivalent
    adj 1: uncertain or unable to decide about what course to
           follow; "was ambivalent about having children"

from The Collaborative International Dictionary of English v.0.48

ambivalent \ambivalent\ adj.
   1. 1 undecided as to whether or not to take a proposed course
      of action; having feelings both for and against the
      proposed action.

   Syn: on the fence(predicate), suspensive, uncertain
        [WordNet 1.5]

from Moby Thesaurus II by Grady Ward, 1.0

66 Moby Thesaurus words for "ambivalent":
      amalgamated, ambiguous, ambitendent, amphibious, antinomic,
      at loose ends, blended, capricious, changeable, combined, complex,
      composite, compound, compounded, conflict, conglomerate,
      contrasting, dappled, double-minded, dubious, eclectic, equivocal,
      fence-sitting, fence-straddling, fickle, fifty-fifty, fluctuate,
      half-and-half, heterogeneous, indecisive, indiscriminate,
      infirm of purpose, intricate, ironic, irresolute, irresolved,
      jumbled, many-sided, medley, mercurial, mingled, miscellaneous,
      mixed, motley, mugwumpian, mugwumpish, multifaceted, multinational,
      multiracial, mutable, of two minds, oxymoronic, paradoxical,
      patchy, pluralistic, promiscuous, scrambled, self-contradictory,
      syncretic, thrown together, uncertain, undecided, undetermined,
      unresolved, unsettled, varied