CONGRATS on losing that much weight.
Get your bodyfat tested before you do anything. What others may be telling you -- that you're too thin -- might be simply that they're used to the fat-fvck you used to be so that you now *seem* too thin to them. With your propensity to gain weight, I would recommend that your cut further before bulking. I'd recommend that you get into single digit bodyfat before doing any bulking whatsoever. With your recent weight loss, you need to continue to make cutting or maintenance part of your lifestyle before you do any bulking at all.
If you were just starting off as a skinny kid with some bodyfat, bulking might be the way to go; but NOT for you. Your probably even need more time to let your skin catch up and tighten up before you start even considering doing any bulking at all.
Summary: get your bodyfat measured. continue the way you are going and even STEP UP your cutting program until you get into single digit bodyfat. Maintain that for 6 months consistently. THEN, and only then, consider doing a very methodical CLEAN bulk. If you don't even know how to measure your own bodyfat, you are not a candidate for bulking. Bulking to most people means eating whatever they want which means they turn into fat fvcks. More muscle, yes, but not intelligently because they add more than they should in FAT.
Btw, you should reconsider your diet and workout. You are a perfect candidate to START a new cutting program now using Diesel's guide stickied above. You need to pick up another meal (could be a whey shake), drop some of those carbs, and increase your cardio in my humble opinion. Good luck bro.
