How do you get rid of a GF that's kinda clingy? Some Help!?

my love of 3 years has told me that i was a liar, a cheat, untrustworthy, a loser and more. After i supported her to the fullest, a car, a house, basically all that she needed and some extra while she jus went to collage. there's jus somethings I'm not to fond of her. we had a great life together but now i want to be alone. i told her a couple of times that we should go our separate way. She cries and tells me that she loves me a lot and don't think she can take if we were not together. i got her to move out to her sisters but she don't like it and misses me and everything she had. she still wants to try and work it out. her fam want me to stay with her but all of mine say leave her. she said she was sorry and didn't really mean it. she will try and work on the stuff i don't like bout her. she's a great girl she took care of me. she's the kind of girl that you would take home to mom and grow old with, But i can't allow myself to be with a person who feels that way bout me, after the things i did for her. help please!