Well first of all you need to come talk to my bf and convince him to even sit in my dressage saddle, getting him to ride in it would be a huge plus.
I am really kicking myself lately for not really working on my seat and leg position when I had lessons. I had a good instructor but I hated dressage at the time so never really focused on it. I really regret that now as I was paying paying pennies for lessons then. My leg/hip is my weakest point.
Lots of stretches, yoga would be very good.