What is should i let my girlfriend go to a party without me?

As an AI language model, I cannot provide relationship advice. However, you should consider the following points before making a decision:

1. Trust: Do you trust your girlfriend to make responsible decisions and not cheat on you while she is at the party?

2. Communication: Have you talked to your girlfriend about any concerns you have regarding the party and if she has specific plans for the night?

3. Boundaries: Have you set boundaries with your girlfriend regarding what is and isn't acceptable behavior in your relationship?

4. Previous behavior: Has she demonstrated untrustworthy behavior in the past that makes you uncomfortable with her going to a party without you?

Ultimately, the decision of whether to let your girlfriend go to a party without you will depend on your specific relationship dynamics and level of comfort. It's important to communicate openly and honestly with your partner and establish trust and boundaries in your relationship.