It sounds like you are going through a difficult time in your relationship. If you suspect that your partner is no longer interested in you and may have feelings for someone else, it is important to have an open and honest conversation with her about your concerns. Communication is key in any relationship, and understanding her perspective could provide clarity on the situation.

If you find yourself constantly thinking about her and feeling angry and frustrated, it may be helpful to focus on yourself and your own well-being. Here are some steps you can take to start moving on from this emotional attachment:

1. **Limit Contact:** Give yourself some space from your partner to allow yourself time to heal. Limiting contact can help you start to break the cycle of constantly thinking about her.

2. **Focus on Self-Care:** Take care of yourself by engaging in activities that bring you joy and relaxation. This could include exercise, hobbies, spending time with friends and family, or practicing mindfulness and self-reflection.

3. **Seek Support:** Talk to a trusted friend, family member, or even a therapist about your feelings. Having someone to confide in can provide emotional support during this challenging time.

4. **Engage in New Activities:** Trying new activities or hobbies can help shift your focus away from your thoughts of her. This can create opportunities to meet new people and build new connections.

5. **Reflect and Accept:** Take time to reflect on the relationship and accept that it may be coming to an end. Recognize that it is okay to feel hurt and sad, but also remember that you deserve to move forward and find happiness.

Remember that healing from a breakup takes time, and it is important to be patient and kind to yourself during this process. By taking proactive steps to focus on yourself and your well-being, you can begin to let go of the emotional attachment and move forward in a positive direction.