i'm assuming your most recent PET scan on 5/8 was clean & no sign of liver mets?
that's certainly a good start!
elevated liver enzymes could be a good indicator, but as Chrissy mentioned, aren't always accurate,
like chrissy, when my liver mets were characterized as "innumerable, immeasureable" my liver enzymes were totally normal & my tm's were only in the 70's.
My 1st liver met was discovered via CT during my primary dx. the next step was a CT guided biopsy.
NOT FUN, but a necessary step to confirm what was seen on the CT was in fact metastatic disease.
i continued to wrestle with liver mets, multiple times, PET scans q12weeks.
Finally had a liver resection in Dec05.
Liver's been NED ever since

Oh, & I never "felt" anything that would indicate the mets has progressed/returned/resolved.
Every time I thought I "felt" something, it was actually just gas.