I'm in complete agreement with the advice tendered by everyone else on this thread.
Sell the 2010 MBA, and put what you get from that sale towards a new - 2014 - MBA. Get a student discount (if you are entitled to that), or, try and buy a refurbished MBA; you should be able to obtain a decent discount.
In September 2010, I bought a MBA - and loved it. However, by 2013, frankly, it was showing its age, and - of equal importance to me - the Applecare I always buy was within a few months of expiring.
Thus, I bought a 2013 MBA, a CTO, in essence, a maxed-out model, and gave the older computer to my brother as a birthday present.
To be honest, the difference between my 2010 model and the 2013 model is enormous. The 2013 model is so much better on every level; it is faster, more stable, the battery is superb, the memory far better, and so on. Seriously, so not tinker with the computer you currently have; sell it, and buy a new, or refurb, model instead. My tuppence worth……..good luck.