"Normal" PSA depends on age. How old are you?www.medicinenet.com/prostate_specific_antigen/page3.htm
You had a negative biopsy, and you're apparently not trending upwards.
If your PSA is high for your age group, you might want to try a fPSA test (free PSA) which can help discern whether the PSA is coming from a benign or cancerous cause.
Your diet and exercise sounds fine to me (not a professional). While there was a lot of excitement around lyc
opene several years ago, the results of studies have been mixed ( www.mayoclinic.org/drugs-supplements/lycopene/evidence/hrb-20059666