I have a girlfriend I don't really like
I'm sorry to hear that. Why don't you like your girlfriend?
Well, I think she's too clingy. She needs to give me space.
You should find someone to date that you do like. It is better to break up than string things along if they keep being annoying and you see no long term potential.
She's just not my type. She's too clingy.
I think maybe you should consider breaking up with her then. It doesn't sound like you like her very much.