I have the same problem my cat cuddles hates the other cats she used to like my cat thunder but sence she had kittens she just hates her and the kittens. So i started to give Cuddles more attention. And if she still was mean to them i would flick her on the nose but i didn't like doing that so i would tell her shut up some how she knew what that ment.And well my othere kittys were mean to her to so i tryed to give cuddles her own area its getting better so far im sorry if i'm no help other wise yes try to find a family member or friend who would like a single cat. Hope things work out for you