6 meals a day and your only at 1700 calories? I'm generally at 1700 calories after breakfast and my morning snack. Rounding up, your only eating 300 calories a meal... a scoop of oatmeal with powda has more calories then that.
Practice makes perfect, and that holds true for eating as well. If your loosing weight at 1700 a day, up the intake 500 calories. This kind of thing is easy. Just try having drinks with calories in them (not soda or crap like that).
While I'm bulking, or even maintaining I drink milk with almost every meal, and a protien shake with dinner (this is generally right after my workout though). A few glasses of milk a day will easily add 500 calories to your diet, and not to mention its HEALTHY for you.
Once its easier for you to eat more, then simply do that. I cant tell you how many times I've been so uncomfortably full, then started cooking my next meal. However, after a while you dont have to stuff yourself like that. Half the time these days I'll be in the middle of one meal, thinking about what I'm going to eat for the next one.