You will attract whatever you are willing to put up with. If you are willing to put up with someone who is flaky, you will attract someone that is a flake. If you are willing to put up with someone who will mistreat you or disrespect you, you will attract someone who will mistreat or disrespect you. If you are willing to put up with someone who takes advantage of you or takes you for granted, you will attract someone who will take advantage of you and/or take you for granted.

Take a look at your relationships and see if there is a pattern of behavior that the other person exhibited that you did not particularly like that may have contributed to the demise of the relationship. The patterns of behavior displayed by your relationship partner are essentially a mirror for you, a clue to you about what you are willing to put up with. If you aren