As I always like to say, I'm not a doctor, nor do I play one on the Internet.
With that out of the way, it sounds to me like your liver still has plenty of miles on it.
Your AST is indeed a tad high (for most of the population, that is, although there are some outliers for whom that number might be normal or at nearly-normal). But different factors can make that number rise or fall, so you want to look at your recent reading as a mere snapshot that doesn't tell the whole story of what - if anything - might be going on with your liver. How are your blood protein and albumin levels? More than AST/ALT levels, these indicate if the liver is working properly. Regarding the ratios of AST to ALT, I'm not aware that these have any great significance other than that, in drinkers, if the ratio is >1 and especially in the neighborhood of >2, then alcohol-induced liver damage is the likely cause.
So far as the blood cell counts, I'm not aware of how the liver would interact with red cell production. Low white cell counts could-maybe-possibly-might have to do with liver dysfunction, but if your doctor took a thorough history from you (covering items such as drinking and other drug [prescription or street] usage, exposure to environmental toxins, etc.) and isn't sounding any alarms, it's probably for good reason.
Finally, know that if you *were* having liver issues (and so far, no one is saying you are), the liver is a very forgiving and resilient organ, and generally doesn't give out without *ample* insult and warning.
Has your doctor made any indication about addressing whether your fatigue is stemming from your low RBC, and how this might be addressed?