H4U, I've been in the same situations. Whenever my W and I would attend social events; if I wasn't ignored, I was belittled. Although she would always play it off as trying to cute and funny. I think it was her way of telling her friends that I wasn't what she really wanted and at the same time placating me by, at least, introducing me to others. It's a big blow to your self-esteem.
Whenever I would mention how I felt, she would brush it off by making nice with me. BTW, this was usually done in conjunction with drinking, so I stopped going out and drinking with her to save myself the abuse.
