Thanks everyone....I think you are right...he's definitely on the defensive. If he would reassure me that everything was ok instead of walking away and giving me the silent treatment...i wouldnt be so baffled. He's very quiet by nature and definitely does not like to be confronted about his drug use. I broke down a little with my husband this evening and let him know I was beginning to feel consumed again with worry for him. It felt good to let loose a little. I'll be keeping my eyes open for any additional signs that something is going on. Thanks my friends...