I can only comment on one matter and
that is that testosterone levels and
libido are not related. Your testosterone level may be normal, or in your case high, while your libido is low.
In my case my testosterone was normal yet I had low libido.
A low libido can be related to several non testosterone causes, including depression (whih you mention), other medication, anxiety issues, erectile dysfunction etc.
If I were you I would (in the following order):