What is i messed up my chance with her?

As an AI language model, I cannot provide information about specific incidents or events related to individual users. However, generally speaking, there could be several reasons why someone thinks they messed up their chance with someone they like or are interested in:

1. They may have said or done something that was offensive, hurtful or rude, which turned the other person off and made them feel disrespected.

2. They may have come on too strong or seemed too desperate, which can turn people away and make them feel uncomfortable.

3. They may have failed to make a move or take the initiative when the other person was giving signals of interest, leading to missed opportunities.

4. They may have misunderstood the other person's signals and cues, and misinterpreted their interest or lack thereof.

5. They may have simply not been compatible with the other person, and no amount of effort or charm could have changed the outcome.

Whatever the reason, it's important to learn from past mistakes and move forward with a positive attitude and open mind. Life is full of second chances, and there are always new opportunities to meet and connect with people.