I dont like my coworker what can I do???

Its a difficult one is this, isnt it?
I wouldnt say I have ever had a co-worker I couldnt tolerate, thats for sure.
I have had a few I didnt send xmas cards to, but thats a world away from not being able to tolerate someone!!!
Maybe this person cant tolerate you either, these things happen and you know what, there is usually a bit of two way resentment, so I think you have to accept that it might not just be the fault of your co-worker,
Sit down like adults and talk about,

There are really times that we really don't like that certain person that we get so irritated whenever they are around... This is really hard if you always saw that person everyday in your work.
What I did before was just try to ignore what I am feeling for that coworker then just try to make yourself busy in work and maybe learn to know that person a little bit more deeper. maybe you would learn to like that co worker later on.

the best solution is to avoid the co-worker.. at times when u can't avoid, ask him to stay out of ur way.. i have some same type of colleagues and can't help it.. but we need to..

Uh,this is not good then.

Why don't you like your co-worker?

I mean,i guess there is some reason for disliking someone.
If so,why not approach your co-worker and talk in a civil manner to avoid more trouble.

It is not comfortable to work with someone you dislike,so,you need to settle whatever matter is in between you to make things better.

i advise that u stay away from him. it is good to maintain a distance between the two of u. if there is no purpose in getting near him, then don't. but if work requires u to go near him and talk, then do so. in the name of work, do what is expected of u, otherwise, stay clear from him to avoid friction.