I know exactly how you feel. I look in the mirror now and I see this big fat guy looking back. Everyone keeps telling me how great I look and they can't believe how much better I look.
I think the main problem is that before I just never paid any attention to how I looked because I was so embarrassed. Now that I've lost so much weight I am paying very close attention to it.
A couple days ago I put on my biggest pair of blue jeans and my old favorite shirt that I use to wear all the time when I was over 310 lbs. Wow, I was in shock by how much smaller I am now. For the first time I see what everyone else must have seen before.
You should be very proud of what you have accomplished so far. I hope to be joining you soon in that over 100 lbs lost club.