Why did she ignore me after she met a female netizen? I talked to her, but she ignored me. No matter how she sends messages, she won't reply or delete me.

It's normal to find a female netizen. If after meeting, I think you don't fit his image, or I think the gap between you two is too big. Although he knows each other, there is no possibility to deepen his understanding, or to deepen his feelings. He feels that there is no possibility to continue to develop his understanding with you.

Keeping it without deleting it also means that two people can be ordinary friends, such as occasionally having something to talk about, or helping each other, or getting to know each other, but there is no possibility of further developing their feelings.

If you feel hopeful to continue to develop your feelings, deepen your impression of him and be kind to him, then you will impress him one day. Work hard.