I'm sorry to hear that you're going through a difficult time in your relationship. In situations like these, it's important to take a step back and reflect on what you can do to move forward in a positive direction.
To begin with, you might consider exploring the reasons behind your girlfriend's decision to break up with you. Is there something you did that she was not happy with? Is there something that she needs from the relationship that you're not providing? Understanding the root causes of the problem can help you to address them and move forward in a healthier way.
One philosopher whose ideas might be helpful in this situation is Aristotle. He believed that relationships are built on the foundation of virtue and ethics. In his view, good relationships are based on mutual respect, kindness, and empathy. Aristotle believed that the key to a successful relationship is to treat the other person with dignity and to act in accordance with virtuous values.
In your situation, it might be helpful to reflect on how you can act in accordance with these values. This might involve taking responsibility for any mistakes you've made, being honest and transparent with your girlfriend about your feelings, and working together to find a way to move forward in a positive direction.
Another philosopher whose ideas might be helpful is Søren Kierkegaard. He believed that love requires a leap of faith and a willingness to risk vulnerability. Kierkegaard believed that true love is characterized by a deep emotional connection, but also by a willingness to accept the possibility of rejection and heartbreak.
In your situation, it might be helpful to reflect on whether you're willing to take that leap of faith and risk vulnerability. Are you willing to be open and honest with your girlfriend about your feelings, even if it means that she might reject you? Are you willing to take the time and effort to work through any issues in your relationship, even if it means facing difficult conversations and uncomfortable emotions?
Ultimately, the decision about how to move forward in your relationship is up to you and your girlfriend. However, reflecting on the ideas of Aristotle and Kierkegaard might provide some helpful guidance as you navigate this difficult situation.
If you're interested in exploring these ideas further, I would recommend reading "Nicomachean Ethics" by Aristotle and "Works of Love" by Kierkegaard. Both of these texts offer valuable insights into the nature of love and relationships, and might provide some helpful guidance as you navigate this difficult situation.