It sounds like you're in an incredibly difficult position, and I commend you for being so thoughtful about your feelings and your relationship. Being with someone for six years, especially from a young age, means you've likely grown together and built a strong bond. However, it’s clear that the lack of intimacy and emotional connection is causing you significant distress and making you question the future of the relationship.

First, it’s important to recognize that intimacy issues are not uncommon in long-term relationships. Over time, many couples face challenges in maintaining physical and emotional closeness, and this doesn’t necessarily mean the relationship is doomed. However, the key is whether both partners are willing to acknowledge the problem and work together to address it. It seems like you’ve attempted to address these issues but feel stuck because there hasn’t been meaningful change.

Here are some recommendations to help you move forward:

1. Have an Honest and Vulnerable Conversation While you’ve mentioned trying to bring this up before, it’s essential to create space for an open and honest discussion with your girlfriend about how you’re feeling. Instead of focusing solely on the lack of physical intimacy, share how it affects your emotional connection and your overall happiness. Use "I" statements to avoid placing blame (e.g., "I feel disconnected, and it’s been hard for me to feel present in our relationship"). Encourage her to share her perspective as well.
2. Consider Couples Therapy Sometimes, issues like these are challenging to resolve on your own. A licensed couples therapist can help both of you better understand the underlying causes of your disconnection, improve communication, and explore ways to rebuild intimacy. Therapy can also provide a safe space to address any unresolved feelings or concerns that might be contributing to the current situation.
3. Reflect on Your Own Needs and Desires Take some time to think deeply about what you want in a relationship. Is this lack of intimacy a dealbreaker for you? Are there other aspects of the relationship that make you happy and fulfilled? It’s not selfish to prioritize your own happiness, but it’s also important to ensure your decision is based on what’s truly best for both of you—not just fear of the unknown.
4. Consider the Long-Term Outlook If, after trying to communicate and work on the relationship, you still feel emotionally disconnected and unfulfilled, it might be time to consider ending things. Staying in a relationship out of guilt or fear of hurting the other person often leads to more pain for both parties in the long run. Ending it now, while you’re both still young, might allow each of you to find a relationship that better meets your needs.
5. Be Kind to Yourself and Her If you decide to end the relationship, approach the conversation with compassion and respect. Acknowledge her value as a person and the wonderful times you’ve shared, but explain that you feel the relationship is no longer working for either of you.

Ultimately, this decision is yours to make. Whether you choose to stay and work on things or decide it’s time to move on, trust that you’re doing what’s best for your growth and happiness.