Hi Sam, and welcome. 100 lbs. in 7 months is a pretty lofty goal, but if you even lose 50 or 60 by the end of the year you'll be well on your way. I haven't seen a lot of activity in this group the past couple of months, but there are a few of us who post our monthly goals at the beginning of each month, and you are welcome to participate. May, of course, is about done, but we'll be starting another one for June in a just a few days.

Yes, losing 2 lbs/week could put you in cute clothes by the holidays, and at your goal next Spring. Definitely something to set your sights on!

Here is the link to the May progress thread if you want to look at it. Like I said, we'll be starting a June one later this week. It's not high pressure or anything, but for those of us doing it on our own, it's a place to state our goals and report weekly.
http://www.myfitnesspal.com/topics/show/583268-tracking-our-success-may-edition