Sam01 wrote:
Also, how should I stay motivated for longer, more frequent runs...?
As always, base training means doing what is "basic"--what is fundamental--for *you* and not for a particular event.
I'm not saying that you shouldn't make more mileage and longer individual runs a *part* of your base work, but they perhaps should not be your major emphasis. (If you have to fight to stay motivated for them, then they're probably not the best thing for you NOW. As the weeks pass, you may find your likes/dislikes shift.)
Instead, listen to your body. Don't try to push pace *and* mileage--if you're running a ten-miler, keep it at that comfortable, non-bonking pace. And look at the kind of session you enjoy: running moderate mileage at changing speeds. Sounds like the definition of fartlek, and that should probably be a major part of your base training.
I would guess that you're more on the speed/strength side of the 800. (Do you do any strength work, I wonder?) I've coached multiple guys under two; one ran as much as 90 miles a week, another rarely hit 20. It's a question of playing to your strengths and building up--but very gradually--your weaknesses.
Sorry to sound like a broken record, but: Different things work for different people. Nothing works for everybody; practically anything works for *somebody*. Use your enthusiasm/boredom as a guide, and at this time of year do stuff that prompts more of the former than of the latter.
BTW, it's probably a good thing that you can't run seven days a week now. If you can do something else that you enjoy (I dunno--basketball? badminton?), on the "off" day(s), that's great; if they're true days off, with little or no physical activity, then maybe you could get in a couple sessions the day before--but you still could probably benefit by making one of them something other than running.
Anyway, good luck. You've already run a 2:02, and you're young--a year of growth is worth two years of coaching. You should get under 2:00 before the end of the season, no problem. I envy you!