Live HU 10$ How do I stop this passive/aggressor?

[Crispy]

I play many Heads Up sesssions against my friend, we have only played about a 100 so far. Most recently he has changed his style to where he raises preflop about 3/4 with good hands and 1/4 with junk. In addition, he has become found of raising and check raising on the assumption that I cant call unless I have top pair. He used to play very laggy, but now has become more preflop passive and postflop aggressive. How should I combat his new style? With my style I raise preflop about 9/10 hands and bet 3/4 and pot on almost every flop. Its troublesome because he will call when he hits, and raise when he thinks he doesnt have it. So I guess the real question, how do I fight a solid player?