Should I feel threatened?

My boyfriend's ex-girlfriend used to be my weight but he just told me she lost a lot of it and is now small like in the 100s. Lately he has been encouraging me to be more in the gym and I was wondering why and now I kind of know why and it hurts.

I've been trying to lose weight since the middle of September. And so far have lost 18lbs. I feel like I need to cut my calories down to less than 500 calories and run everyday as well as lift weights. I have been cutting my calories lower and lower. I need to make this happen. I need to lose 200lbs in less than 10 months.

I've lost 18lbs in 20 days. So do you think I can make it happen if I run plus weight train plus eat less than 500 calories a day?
Should I feel threatened?
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