Hey there! It sounds like you're in a tricky situation, but it's great that you're aware of and sensitive to her past experiences. Communication is key in any relationship, so here's a step-by-step approach you can use to address this issue:

1. **Find the Right Time to Talk**: Choose a calm, private moment to discuss this with her, ensuring there are no distractions. It's important that both of you are relaxed and open to having a conversation.

2. **Use ‘I’ Statements**: Explain how you feel using "I" statements to avoid sounding accusatory. For example, "I feel confused and a bit hurt when I see that you get upset with me hanging out with friends, but it's okay for you."

3. **Acknowledge Her Past**: Show empathy for her past relationship experiences. You might say, "I understand that you've had tough experiences before, and I want to be sensitive to that. I care about how you feel and I want us to be a strong team."

4. **Express Your Concerns**: Gently explain that you're worried her past is affecting your current relationship. You could say, "It's important to me that our relationship is based on trust and mutual respect, and I'm worried that these feelings might be affecting us."

5. **Seek Her Perspective**: Ask her to explain why she feels uncomfortable when you hang out with other people. Understanding her perspective can help both of you find a solution. For instance, "Can you help me understand what makes you uncomfortable when I'm with my friends?"

6. **Reassure Her**: Let her know that you value your relationship and you're committed to her. Reassure her that your friendships don't diminish your love and commitment to her. "I want you to know that no one else can take your place in my life."

7. **Set Boundaries Together**: Discuss and agree on boundaries that make both of you feel secure and respected. For example, you might decide to check in with each other during social outings to maintain a sense of connection.

8. **Consider Professional Help**: If this issue persists and it's causing significant strain, suggesting couples counseling might be beneficial. A professional can help navigate these feelings and offer strategies for healthier communication and trust-building.

Remember, it's a process, and it might take time for her to feel secure. Patience and continuous communication will go a long way. Best of luck!