I'm sorry, missing old Ts really sucks. I still struggle, sometimes, with missing my last T - even though in the end there were a lot of reasons why he wasn't a good fit. I miss the good parts, and new T (who I've been seeing for almost a year, so not so "new" anymore) just isn't the same.
Wish I had good advice for ya... does it help at all to think what things you good things you get with new T, that you didn't have with old T? Or, if to think about what might be missing... and to see if there's any way new T can help provide that?
Sorry it's hard...