What does it mean when the relationships you have with others always failed? What advice would you give to someone who can't seem to love herself?
I hate to sound trite, but consistent failure means you are going about it the wrong way. Often we convince ourselves that if we do the same thing over again, we'll get better results the next time; yet, that almost never works. Not knowing what you are doing or how the relationships are failing, I can't offer more detailed suggestions.
People who don't like themselves are often dwelling on past mistakes and failures. They are sorry for what they have done, but they don't channel that sorry into energy to change. My guess is that you are not the person you used to be. If you were back in the same situation with what you know now, you would make different choices. So accept who you are and that you are a work in progress. Focus on where you are going. "Not that I have already attained, or am already perfected; but I press on, that I may lay hold of that for which Christ Jesus has also laid hold of me. Brethren, I do not count myself to have apprehended; but one thing I do, forgetting those things which are behind and reaching forward to those things which are ahead, I press toward the goal for the prize of the upward call of God in Christ Jesus" (Philippians 3:12-14).