Your partner wants to end the relationship
No matter how much potential you see in the relationship, or how much you love your partner, you can not ‘fix’ the relationship without him/her. Relationships take two people.
Prior to letting go, it may be to your benefit to have one last conversation with your partner where you state your perspective. In some situations you might be able to ‘win’ him/her over. Together, can the two of you develop a strategy of change?
A few cautions: too much persuasion on your end runs the risk of putting yourself in an overly compromised situation. If you have to beg to get your partner to take you back, then you may be over-giving, and your partner over-taking. This could result in your partner acting selfishly, not because she/he is a bad person, but rather because you over gave.
Balance in a relationship also means boundaries. When someone you love is not treating you well, step back and observe how you feel. Explore within yourself why you want to spend time with someone who is not treating you well. Does it really feel good or are you simply wanting them out of force of habit? Or memories of what used to be?
While most people will have an opinion about whether you and your partner should stay together, ultimately, the answer to that question is an intensely personal decision that only you can answer. Ultimately, you will have to live with the outcome.
No one is perfect. Everyone has their limitations. The question is what limitations can you accept and which ones can you not. Once you answer that for yourself, you might find that the relationship you are currently in, or the one that has just ended, wasn’t ideal for you – and might lead you to something better.