Oh Sarah, don't feel guilty in any way for grabbing the fags, sounds like you've been through hell recently. I did the same about 10 years ago when I split with my daughters ex. I had given up 3 years before, and he hadn't. I wouldn't let him smoke in the house, or come near me when he had been smoking. But as soon as he packed his bags and left, I went and bought a pack and sat in the living room and smoked. Unfortunately, that was the downhill spiral to smoking again.
I stopped again in October last year, and this time it's for good.
Just look on what you did as a lapse in judgement. You have done nothing wrong at all. Throw away what you have left and just carry on as before. There is not enough nicotine in your system yet to get you addicted again, so stop now before you are.
About your firends.... Can you call them and explain that you didn't want to lose touch with them, but it was pressure from your OH? If they are good friends, they will totally understand. I know it all seems so hopeless now, but I am living proof that it can and will get better.
And we are all here to listen hun.
xxxx