My friend said, "I'll get the friend, you get the big girl"?

My friend asked his big friend who he said he's not attracted to, Martha, to bring a second friend so it can be a double date. My friend said after hanging up, "I'll get the friend, you can have Martha" I wondered what he thought I was. It really bothered me because he didn't act like I was going to be upset either. I did feel like he didn't respect my feelings, because he just dumped a girl onto me that HE didn't want because she's not attractive. I just felt like he used me to his advantage and he knew he could do it because I am a shy person.