Helo,
Juz wondering if you are a physiotherapist?coz if you are not..i think if you see a physitherapist they are the main one who can actually helped you a lot. From wat you are saying from i am actually presuming that after your 1.5 year ago injury your rehab programme was not sufficient enough. Injury involve knee does not only aim to reduce pain, strenghthen muscles the quads, hams, abd,add, gain full ROm but also gaining back your balance and proprioception. These training the propriception and balance training will something that you must do...before you proceed to training that involve speed and agility. These aspects is very important for someone so active like you..before you can get back fully to sport.
for present, i am advising you to wear knee guard before playing game...lastly, get help from a physiotherapist near you...or i can help you out with simple program for you.
Thanks.