It can be difficult to determine if someone is being genuine or if they have feelings for someone else. However, there are some signs you can look out for:

1. **Lack of consistency**: If the woman in question is inconsistent in her behavior towards you, it may be a sign that her feelings are elsewhere. Pay attention to how she acts when she is with you versus when she is with the other person.

2. **Avoidance**: If she seems to always be busy or unavailable when you want to spend time together, it could be because she is prioritizing the other person.

3. **Lack of emotional connection**: If you feel that she is emotionally distant or that her affection towards you is insincere, it may indicate that her heart is not fully invested in the relationship.

4. **Body language and interactions**: Watch for subtle cues in her body language and interactions with the other person. Does she light up when they are around? Does she seem more engaged and attentive to them?

It's important to have an open and honest conversation with the woman about your concerns. Express your feelings and ask her directly about where she stands in the relationship. Communication is key in any relationship, and it's important to address any doubts or suspicions you may have. Remember that you deserve to be with someone who truly values and respects you.