How Well Am I Doing?

Hello all, this is the first time being on one of these boards, so I hope that I am doing this right :/. But anyway...I am 17 years old, 6 ft. 2 in. tall, and about 150 lbs. I believe I am doing all of the right things in order to maintain good physical health (both inner and outer). I eat a balanced meal and limit my sugars and snacky foods to MAYBE a brownie/cookie/whatever a day (with the occasional days of a little more snacks ). When I do "snack" I try to have a fruit or veggie. As for exercise, I do it at least 4 times a week, lifting weights every other day and riding my exercise bike every day (15 min. on weight days and 25 min. on non-weight). Also, I do not drink or smoke and get a decent amount of sleep a night. As you can tell, I feel that I have a general good control on my lifestyle. However, when I do have the occasional snack or unhealthy food choice, I feel very guilty about the choice. I hope this is not the start of an eating disorder and I am fearful of having food choices run my life; but even with my lifestyle, I still feel somewhat disappointed with my body. Sorry for the long explanation, I just wanted to put everything out there that may need to be said. Basically, I've read on several sites different ways to "Live the healthy life style" and I wanted to hear your guys' take. How well am I doing? Should I be doing anything better? Does anybody feel the same way about the little snacks, and what can I do to try and eliminate the guilt? Thanks for all who respond