I'm dating someone that I don't  really like
Why date someone if you really don't like them?
I just don't like being lonely.
I'm sure you can find an easier way to relieve your loneliness. It's not right to continue to date someone who you have no feelings for. Please think of their feelings as well.
Well, I'll keep it up until I find someone else.
You should just be honest with the person that you are dating. I do not think that it is going to do either of you any good to stay in a relationship with someone if you have minimal feelings for them.