Even if you didn't get enough mass (which it looks like you did), it's good habit to throw in a cut to mix things up with your body. After a while of bulking, the body will get used to the excess carbs/cals/rest and will eventually adapt to the routine. Do a cut even if you feel like you aren't big yet, then do another mass phase. I usually do a bulk from October to January, followed by a cut from January to March and then April will be a mini bulk followed by a 2 month super shred for that summer bod.