Most Helpful Guy
If he still likes you, then wait. No doubt he will come around eventually and contact you. If he contacts you, then he contacts you. If he doesn't contact you, then don't be disappointed. Just wait and see what happens, if in fact he came to your brother's house for the reason that he likes you.
If you get back together with your ex, make sure you don't make the same mistakes that happened the first time around, otherwise it'll just lead to breakup again.