you need to jack off, otherwise kids will make fun of you. 5.5-6 is big for a 13 year old to your lucky. but your probably about done with puberty now from the stage that your in (stage 4 out of 5)
yes you should be getting a boner if your TURNED ON. if you arent turned on, then you wont get hard.
but yes you did cum. its your bodies way of releasing the built up sperm that you have in your body because you dont jack off.