Welcome. There are several groups here dedicated to us folks with lots of weight to lose. The 100 pound club is very supportive group of people.
Do you have a plan? Tell us about your first steps.
While it's nice to have support from friends, family, spouse, etc. weight loss is a pretty private and personal venture. Don't count on others to keep you motivated. If they have been critical in the past (as you have posted), it is doubtful they will magically change. You are the one holding the fork. You have 2 choices. Do It *or* dream it.