Congratulations on finding your dress!
I bought my dress 2 years before my wedding date (we will have been engaged 2 and a half years before marrying) and I'm SO happy to have it all out of the way! No worrying if it will arrive on time. If you've found it, you've found it! And really, who would keep looking at dresses after they've bought theirs? It's awesome advice, but I kind of felt like "duh!" as people shared that with me a lot, haha.