If definitely know the feeling but something happened one day that made me change much of the feeling about myself. I used to hate going to parties because I, like you, am an introvert and find it hard to mingle with people. I just felt for sure that nobody could possible want to speak with me or meet me on any level. However, a woman I know and I were speaking in broad terms about going to parties together and she told me that out of all the people she knew she was most comfortable bringing me to parties because she knew that she could bring me and let me be on my own. She said that she knew that I would always find my way around and that I could always find something to speak about with just about anyone. I realized it was pretty much true and it became easier and easier to speak with people because I became more and more comfortable with myself.