Lose 50++ lbs

I'm currently planning my wedding even though we are already married. The wedding is set to take place in November on our 2nd anniversary. My weight has been up and down my whole life but after having our three children I'm the biggest I ever been. Being here and healthy for my children is my biggest motivation,I also wanna be completely happy and comfortable on our big day..if anyone is serious about losing 50+ lbs please add me I'll take all the help/advice I can get