I don't want to go to my cousin's wedding
Why don't you want to go to your cousin's wedding?
It doesn't look like I'm going to enjoy it. Why should everyone get married when I want to get divorced.
If your cousin wants you at the wedding it probably means a lot to him that you go. Weddings are fun and you should enjoy it especially when it's your cousin's wedding. It would seem really bad if you turn down the invitation and your cousin will likely be pretty pissed off at you.
Oh come on they don't want me there! They look at me like I am a mad man.
I am sorry that you don't feel like they like you but maybe if you go and try to enjoy yourself, they would appreciate the effort you made. It would be good for your family relationship to get stronger.