I'm thinking of proposing to my gf. My sister was proposed to by her bf but I want to have my wedding before theirs.
Why do you want to get married before your sister?
I am worried about the reaction of my sister if I don't beat her to the altar.
You shouldn't rush to get married, especially if the reason is just so your sister doesn't get more attention. Each of your marriages is special so you shouldn't ruin your sister's special event with your own.
My sister is getting married first because I made the mistake of not proposing faster in the first place.
Trying to steal the spotlight from your sister is only going to make people like you less, particularly your sisters spouse and their family. Get married when it feels right for your.