Is it normal to always want to get the best things over my cousin?

It's normal, but it's not helpful. I felt this way for years about presents, getting to go places... but now it's obvious that although she seems happy with her life, I would be hate it. I'm not in the least jealous any more.

I'm completely jealous of my cousin and in fact a few years ago when I wasn't so collected as I am now, I could honestly say I hated her.

I won't bitch on about her but she's always better than me and doesn't matter what I do, she's already done it. She's also getting married soon, will finish uni and move into her own house.

So yes, it's normal.

Does your cousin get more positive attention than you do, regardless of your self-proclaimed superior appearance?

Jealousy is caused by a perceived threat to a relationship by another person.

I'm the same way but my cousin has to b better at eveything else than me,then when I prove I'm better he starts crying or tells my aunt or comes up with some bs reason why the playing feild wasn't even.normal.