It can be difficult to determine if your female partner is cheating or is no longer into you without clear evidence or open communication. However, here are some signs to watch out for:

1. Change in Behavior: Notice if there is a sudden change in her behavior towards you. This can include being distant, uninterested, or secretive.

2. Decreased Communication: If your partner used to be open and communicative but has become less engaged in meaningful conversations, it could be a red flag.

3. Increased Privacy: Pay attention if she becomes overly protective of her phone, social media accounts, or personal belongings. This may indicate an attempt to hide something.

4. Lack of Intimacy: If there is a noticeable decline in physical intimacy or she suddenly shows disinterest in being affectionate, it may suggest a loss of emotional connection.

5. Strange Schedule Changes: Be aware of any sudden changes in her routine, unexplained absences, or a lot of "me-time" without any valid reasons.

While these signs might indicate potential issues, they don't necessarily prove infidelity or loss of interest. It's vital to have open and honest communication to address your concerns. Here's how to proceed:

1. Communicate: Express your concern in a calm and non-accusatory manner. Ask her directly about any changes you've noticed and give her an opportunity to explain.

2. Active Listening: Give her space to express her feelings and concerns. Listen attentively without interrupting or assuming the worst.

3. Seek Professional Help: If you're struggling to communicate effectively or are unable to resolve issues on your own, consider seeking the guidance of a couples therapist. They can provide a safe and unbiased environment to work through your concerns.

4. Trust Your Instincts: Remember to trust your instincts but avoid jumping to conclusions without concrete evidence. It's important not to make unfounded accusations that could harm your relationship further.

Remember, maintaining a healthy relationship requires open communication, trust, and understanding.