If he were, you would have asked him to accompany you to your brother's wedding, not the other way around.
Are you dating him exclusively? Or are you considering other options? If you aren't even dating him exclusively, you might want to let him know. Though if you've been going out since January, he has a right to assume that by this point it IS exclusive.
Still, if you don't want to introduce him to your parents yet, just tell him that you enjoy seeing him and what not, but that you are not ready to take that step. If he doesn't understand, he's probably a bit too insecure in the first place. That ONE point should be enough.
Annoying wotmaniacs for 10 years.
Oh, I don't have time for this. I have to go and buy a single piece of fruit with a coupon and then return it, making people wait behind me while I complain. - Prof. Farnsworth
The Voice of Lews Therin
Find out what WOT really means...