I can't beat this? bishop trade

For some reason i cant post a diagram for you guys so bear with me here. Today i was playing 15/10 ranked and this guy challenged me. I was white and this is how the game played out:

1. e4, b6

2. d4, a5

3. Ng1-Nf3, g6

4. Nb1-Nc3, h5

(I thought i was going to destroy him at this point because i had such a strong center.)

5. Bf1-Bc4, Bf8-Bh6 <--(this is the frustrating part! he basicly forces a bishop trade)

6. Bc1xBh6, Nf8xBh6

7. 0-0, Bc8-Ba6 (forcing another trade)

8.Bc4xBa6, Nb8xBa6

So at this point he has made basicly an inverted pawn structure, cleared his first row of minor pieces, and has forced a trade of all bishops. I lost this round when he was able to trap my horses from moving with his pawns, then he went wild with his queen and eventually put me into checkmate. I played him a second time, trying to defend my bishops with my queen but he defeated me likewise. If anyone could give me some advice this kind of game that would be great!