He doesn't need any further testing. He has a conclusive result.
I've had to do far more research on this subject than I'd ever hoped. Believe me when I tell you there are times when I feel like suddenly I have a "symptom." (of course, no matter how careful I am, I probably have more to fear than you)
The mind plays awful games with us. I'd say you are absolutely fine with the 90 and 125 day tests. If it makes you feel better get another test to put your mind at ease.
Anxiety about getting tested is worse than the test. Believe me, I know!
Every test done after 12 weeks of exposure is conclusive.Your 90 and 125 days test are the same and they should be the same. If your boy friend is negative as you said and both of you are mutually committed, then you have no reason to worry anout the HIV. Relax and enjoy your life.