Playing Awesome, but Not Enough Volume

So I've been playing so little lately. I really need to buckle down on my thesis work and my work work. Weekdays are spent doing work and weekends are spent with the gf which leaves almost no time at all for poker. Despite that fact, I'm playing super well as of late. I decided to play only 2 tables instead of 3 and I think that really helps you to re-focus on your game and make sure you are playing tip top. I also noticed my long term graph has a very steady, sharply descending red line. I long thought this was because I wasn't bluffing enough but but I think it's more, much more, because I'm not calling enough bluffs and playing far too tight especially preflop. Playing only 2 tables really lets me play to my opponent as well exhibited in this hand:

Hero (BB): $281.50
BTN/SB: $154.60

Pre Flop: ($1.50) Hero is BB with Q A
BTN/SB raises to $3, Hero raises to $10, BTN/SB calls $7

Flop: ($20.00) 6 7 5 (2 players)
Hero checks, BTN/SB checks

Turn: ($20.00) 9 (2 players)
Hero checks, BTN/SB bets $12, Hero calls $12

River: ($44.00) 9 (2 players)
Hero checks, BTN/SB bets $20, Hero calls $20

Final Pot: $84.00
Hero shows Q A (a pair of Nines)
BTN/SB shows Q J (a pair of Nines)
Hero wins $83.50
(Rake: $0.50)

I'm not trying to brag about this call or anything, I actually think it's somewhat standard but had I been playing 3 tables I may have overlooked the fact that this guy was a bad player playing very LAG. I called turn cause I though I could be good and I had overcards with spade outs if not. On river I'm getting 3:1 to call and I'm certain this opponent will be bluffing that often. His line doesn't make sense for anything. He wasnt good enough to v-bet slim with one pair so his hand is very polarized between air and monsters.

Anyways I really wish I could play more but I have a lot of pressure on me right now to finish my thesis work and get a full-time job come august and september. We'll see how that pans out, in the mean time, with the little time I spend playing poker, I hope I can keep playing at this level.