20 year old momma of 2

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Hi Im trying to lose another 30 lbs and many inches from my waist and hips. I find it really hard to stay motivated, and my fiance who is trying to gain weight likes to offer me the junk food he buys himself. And with 2 kids it is hard to motivate myself to get off the couch and go for a walk. would love some recipe tips and friends to talk to when Im feeling discouraged.