I feel ya. I just did the exact same thing, moved to a new apartment with full length mirrors. I'm pretty happy wiht how I look now, but they still weird me out and I find myself picking at little flaws. Ugh. I remember before I lost weight I went to a friend's house for a party, and I thought i was looking pretty good, hair done, makeup on, etc. Well, I went to use her bathroom, and she had not one but 3 giant mirrors. It was awful. You can do this, though! Cover those mirrors if you have to, or stick positive affirmations all over the parts that would show what you don't like. Keep the motivation, but don't let yourself start to define what you look like by them. I am firmly convinced that people always look better in motion, and mirrors or photos will never capture what someone truly looks like in person. Ever.
There are a lot of people who have been successful with WW without the meetings. I used to do online but cancelled it after a few months, and now I follow the program myself, using message boards and a group of online friends for support. It's very possible to stay on track this way, as long as you interact and make a place for yourself in a group where accountability is important. I'm now doing WW Core, and I LOVE it. Flex was good for me in getting most of the weight off, but I didn't think I'd be able to maintain it. This I will do for life, even if I never lost another pound.
Good luck! I know that you'll do great