Hi Laura,
I'll chime in too. I think we all hit the place where you now are: we have had some success, lost some weight, are feeling pretty good with the success to date and are tired of being on a diet. I also think reality hits that this is really how we need to be all the time. We need to be mindful of what we eat. It's part of the mourning process- Mourning the loss of carefree eating.
What do you mean that you have only lost 40 pounds??? Wow, you've lost 40 pounds!!! Celebrate it. Look what you've accomplished. Please don't throw in the towel. If you do, you'll probably backslide, gain what you have lost, and then feel even worse.
Perhaps another program might be a good idea, but know that you most likely will continue to lose more slowly than you'd like. 1-2 pounds a week is typical with most diets and it looks like you're tracking at about that with MRC. I tried WW several times in the past and only lost 1/4-1/2 pound per week...talk about discouraging!!
Anyway, rather than looking 5 months down the road, just make mini-goals, one day at a time, and if you slip up, big deal, it just means the loss will be slower. The important thing is to keep at it.
Do you get support at your center? Some people call in if they feel they are ready to cheat and get "talked down" by the staff.
It sounds like you are at a cross roads right now. Do some soul searching and I hope you reaffirm your commitment. You can do it!!
FYI: I'm having the same struggle you are right now. I'll go for 2-3 days perfectly on plan and then have an off plan day. Then back OP for 2-3 days and wham another off plan day. I'm not beating myself or even trying to figure out why I keep doing it. I am determined to keep at it, cuz even with off plan days, the habits are changing and while I may be losing really slowly, at least I'm going in the right direction.
Hang it there and keep at it. Remember, this is temporary. You can do anything for 5 months, it's only 5 months.


), but everytime I say "yes" to a drink, I also find myself saying "yes" to everything else, sharp cheese and crackers, dark chocolate...they just all go together. Alcohol is a real trigger, so, for me, I can't afford to have any alcohol. I guess I'm an all or nothing kind of gal. Seeing myself repeat the pattern everytime, I know it just isn't an option. Again, I just tell myself this isn't forever, but has to be so for now. The last couple of times I've had a drink, I haven't even liked it that much, so that helps with the will power. I think our cravings do go away, but during the cleansing phase it's tough. 
ha ha