She Broke up with me, should i blame myself? could i have done things differently?

I was with a girl for 4 and a half years. She broke up with me 8 times. Well we broke up again. She blamed everything on me. She had a part time job, but she has a degree to get a better full time job so I was trying to get her to get a better job, but she seemed uninterested too. She said that because me and her hang out a lot that s why she hasn t gotten a better job which is bullcrap cause I don t get home until 5pm she has all day to get a job, but she sleeps till noon to 2 everyday. She acts jerky towards me, she gets snippy with me out of nowhere and talks to me with a tone. She doesn t take responsibilities for her actions, if she acts like an *** she blames it on me saying its my fault for her acting like an ***. she ignores me when friends and family are around, she gets snippy with me and avoids me, and she ll laugh and carry on with her friends and stuff but not with me, she ll be nasty. she also hung out with her ex behind my back a little while back, and of course she blamed that on me too. She said it was my fault that she did that. I really love her, and we have a lot in common and share the same opinions and stuff but should I just move on?